fix for passing language_level externally as compiler directive

Cython/Compiler/Main.py

@@ -473,6 +473,8 @@ class CompilationOptions(object):
             defaults = default_options
         self.__dict__.update(defaults)
         self.__dict__.update(kw)
+        if 'language_level' not in kw and 'language_level' in self.compiler_directives:
+            self.language_level = int(self.compiler_directives['language_level'])
 
     def create_context(self):
         return Context(self.include_path, self.compiler_directives,

runtests.py

@@ -183,6 +183,7 @@ VER_DEP_MODULES = {
                                           'run.initial_file_path',  # relative import
                                           ]),
     (2,6) : (operator.lt, lambda x: x in ['run.print_function',
+                                          'run.language_level', # print function
                                           'run.cython3',
                                           'run.property_decorator_T593', # prop.setter etc.
                                           'run.generators_py', # generators, with statement

tests/run/language_level.srctree

+PYTHON setup.py build_ext --inplace
+PYTHON -c "import directive2; import directive3"
+PYTHON -c "import infile2; import infile3"
+
+######## setup.py ########
+
+from Cython.Build.Dependencies import cythonize
+from distutils.core import setup
+
+setup(
+    ext_modules = (cythonize("infile*.py") +
+                   cythonize("directive2.py", compiler_directives={'language_level': 2}) +
+                   cythonize("directive3.py", compiler_directives={'language_level': 3})
+                   )
+)
+
+######## directive3.py ########
+
+import sys
+print("SUCCESS", file=sys.stdout)
+
+######## directive2.py ########
+
+print "SUCCESS"
+
+######## infile3.py ########
+
+# cython: language_level=3
+
+import sys
+print("SUCCESS", file=sys.stdout)
+
+######## infile2.py ########
+
+# cython: language_level=2
+
+print "SUCCESS"