build and install "Cython.Runtime.refnanny", use it as a fallback if a bare...

build and install "Cython.Runtime.refnanny", use it as a fallback if a bare "refnanny" module is not available for import

Cython/Compiler/ModuleNode.py

@@ -1587,8 +1587,13 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
 
         code.putln("#ifdef CYTHON_REFNANNY")
         code.putln("void* __pyx_refchk = NULL;")
-        code.putln("__Pyx_Refnanny = (__Pyx_RefnannyAPIStruct*) PyCObject_Import((char *)\"refnanny\", (char *)\"RefnannyAPI\");")
-        code.putln("if (!__Pyx_Refnanny) Py_FatalError(\"failed to import refnanny module\");")
+        code.putln("__Pyx_Refnanny = __Pyx_ImportRefcountAPI(\"refnanny\");")
+        code.putln("if (!__Pyx_Refnanny) {")
+        code.putln("  PyErr_Clear();")
+        code.putln("  __Pyx_Refnanny = __Pyx_ImportRefcountAPI(\"Cython.Runtime.refnanny\");")
+        code.putln("  if (!__Pyx_Refnanny)")
+        code.putln("      Py_FatalError(\"failed to import refnanny module\");")
+        code.putln("}")
         code.putln("__pyx_refchk = __Pyx_Refnanny->NewContext(\"%s\", __LINE__);"% header3)
         code.putln("#endif")
 
@@ -2337,6 +2342,8 @@ typedef struct {
   int (*FinishContext)(void*);
 } __Pyx_RefnannyAPIStruct;
 static __Pyx_RefnannyAPIStruct* __Pyx_Refnanny = NULL;
+#define __Pyx_ImportRefcountAPI(name) \
+  (__Pyx_RefnannyAPIStruct*) PyCObject_Import((char *)name, (char *)\"RefnannyAPI\")
 #define __Pyx_INCREF(r) __Pyx_Refnanny->INCREF(__pyx_refchk, (r), __LINE__)
 #define __Pyx_DECREF(r) __Pyx_Refnanny->DECREF(__pyx_refchk, (r), __LINE__)
 #define __Pyx_XDECREF(r) if((r) == NULL) ; else __Pyx_DECREF(r)

Makefile

@@ -14,6 +14,7 @@ clean:
 	@rm -f Cython/Compiler/Parsing.{c,so,pyd}
 	@rm -f Cython/Compiler/Scanning.{c,so,pyd}
 	@rm -f Cython/Compiler/Visitor.{c,so,pyd}
+	@rm -f Cython/Runtime/refnanny.{c,so,pyd}
 	@rm -f Cython/Plex/Scanners.{c,so,pyd}
 	@(cd Demos; $(MAKE) clean)
 

setup.py

@@ -41,12 +41,17 @@ except ValueError:
         compiled_modules = ["Cython.Plex.Scanners",
                             "Cython.Compiler.Scanning",
                             "Cython.Compiler.Parsing",
-                            "Cython.Compiler.Visitor"]
+                            "Cython.Compiler.Visitor",
+                            "Cython.Runtime.refnanny"]
         extensions = []
         for module in compiled_modules:
             source_file = os.path.join(source_root, *module.split('.'))
+            if os.path.exists(source_file + ".py"):
+                source_file = source_file + ".py"
+            else:
+                source_file = source_file + ".pyx"
             print("Compiling module %s ..." % module)
-            result = compile(source_file + ".py")
+            result = compile(source_file)
             if result.c_file:
                 extensions.append(
                     Extension(module, sources = [result.c_file])
@@ -101,6 +106,7 @@ setup(
   packages=[
     'Cython',
     'Cython.Compiler',
+    'Cython.Runtime',
     'Cython.Distutils',
     'Cython.Mac',
     'Cython.Unix',