configure: Bump the minimum required Python version to 3.6

All our supported build platforms have Python 3.6 or newer nowadays, and
there are some useful features in Python 3.6 which are not available in
3.5 yet (e.g. the type hint annotations which will allow us to statically
type the QAPI parser), so let's bump the minimum Python version to 3.6 now.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200923162908.95372-1-thuth@redhat.com>
Message-Id: <20200925154027.12672-16-alex.bennee@linaro.org>

3 files changed, 4 insertions, 6 deletions

diff --git a/configure b/configure
index ca9b458ea0..a5841241be 100755
--- a/configure
+++ b/configure
@@ -1964,8 +1964,8 @@ fi
 
 # Note that if the Python conditional here evaluates True we will exit
 # with status 1 which is a shell 'false' value.
-if ! $python -c 'import sys; sys.exit(sys.version_info < (3,5))'; then
-  error_exit "Cannot use '$python', Python >= 3.5 is required." \
+if ! $python -c 'import sys; sys.exit(sys.version_info < (3,6))'; then
+  error_exit "Cannot use '$python', Python >= 3.6 is required." \
       "Use --python=/path/to/python to specify a supported Python."
 fi
 
diff --git a/docs/conf.py b/docs/conf.py
index 606f623211..00e1b750e2 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -36,9 +36,9 @@ from sphinx.errors import ConfigError
 # In newer versions of Sphinx this will display nicely; in older versions
 # Sphinx will also produce a Python backtrace but at least the information
 # gets printed...
-if sys.version_info < (3,5):
+if sys.version_info < (3,6):
     raise ConfigError(
-        "QEMU requires a Sphinx that uses Python 3.5 or better\n")
+        "QEMU requires a Sphinx that uses Python 3.6 or better\n")
 
 # The per-manual conf.py will set qemu_docdir for a single-manual build;
 # otherwise set it here if this is an entire-manual-set build.
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 91e4a57126..f48460480a 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -40,8 +40,6 @@ sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'python'))
 from qemu import qtest
 from qemu.qmp import QMPMessage
 
-assert sys.version_info >= (3, 6)
-
 # Use this logger for logging messages directly from the iotests module
 logger = logging.getLogger('qemu.iotests')
 logger.addHandler(logging.NullHandler())