bpo-36876: Add a tool that identifies unsupported global C variables. (#15877)

Lib/test/test_check_c_globals.py

@@ -0,0 +1,22 @@
+import unittest
+import test.test_tools
+
+test.test_tools.skip_if_missing('c-analyzer')
+with test.test_tools.imports_under_tool('c-analyzer'):
+    from c_globals.__main__ import main
+
+
+class ActualChecks(unittest.TestCase):
+
+    # XXX Also run the check in "make check".
+    @unittest.expectedFailure
+    def test_check_c_globals(self):
+        try:
+            main('check', {})
+        except NotImplementedError:
+            raise unittest.SkipTest('not supported on this host')
+
+
+if __name__ == '__main__':
+    # Test needs to be a package, so we can do relative imports.
+    unittest.main()