Modifications to support iOS as a development platform

Lib/test/test_import/__init__.py

 # We import importlib *ASAP* in order to test #15386
 import importlib
 import importlib.util
 from importlib._bootstrap_external import _get_sourcefile
 import builtins
 import marshal
 import os
 import platform
 import py_compile
 import random
@@ skipping 260 matching lines @@
         # Issue 4236
         testfn = script_helper.make_script('', TESTFN, textwrap.dedent("""\
             import sys
             class C:
                def __del__(self):
                   import importlib
             sys.argv.insert(0, C())
             """))
         script_helper.assert_python_ok(testfn)
 
+    @skip_if_dont_write_bytecode
     def test_timestamp_overflow(self):
         # A modification timestamp larger than 2**32 should not be a problem
         # when importing a module (issue #11235).
         sys.path.insert(0, os.curdir)
         try:
             source = TESTFN + ".py"
             compiled = importlib.util.cache_from_source(source)
             with open(source, 'w') as f:
                 pass
             try:
@@ skipping 831 matching lines @@
             import test.test_import.data.circular_imports.rebinding as rebinding
         except ImportError:
             self.fail('circular import with rebinding of module attribute failed')
         from test.test_import.data.circular_imports.subpkg import util
         self.assertIs(util.util, rebinding.util)
 
 
 if __name__ == '__main__':
     # Test needs to be a package, so we can do relative imports.
     unittest.main()