Index: ctypesgencore/processor/operations.py
===================================================================
--- ctypesgencore/processor/operations.py	(revision 47)
+++ ctypesgencore/processor/operations.py	(working copy)
@@ -27,6 +27,7 @@
             
             data.typedefs.append(typedef)
             data.all.insert(data.all.index(struct)+1,typedef)
+            data.output_order.append(("typedef", typedef))
 
 def remove_descriptions_in_system_headers(data,opts):
     """remove_descriptions_in_system_headers() removes descriptions if they came
Index: ctypesgencore/libraryloader.py
===================================================================
--- ctypesgencore/libraryloader.py	(revision 47)
+++ ctypesgencore/libraryloader.py	(working copy)
@@ -79,6 +79,9 @@
             
             for path in self.getplatformpaths(libname):
                 yield path
+    
+    def getplatformpaths(self, libname):
+        return []
 
 # Darwin (Mac OS X)
 
@@ -145,7 +148,7 @@
         #
         # We assume the DT_RPATH and DT_RUNPATH binary sections are omitted.
 
-        directories = self.other_paths.copy()
+        directories = self.other_dirs[:]
         directories.append(".")
         directories.extend(_environ_path('LD_LIBRARY_PATH'))
 
@@ -217,17 +220,21 @@
 
 # Platform switching
 
+# If your value of sys.platform does not appear in this dict, please contact
+# the Ctypesgen maintainers.
+
 loaderclass = {
     "darwin":   DarwinLibraryLoader,
     "cygwin":   WindowsLibraryLoader,
-    "linux":    LinuxLibraryLoader,
+    "linux2":   LinuxLibraryLoader,
     "win32":    WindowsLibraryLoader
 }
-loader = loaderclass[sys.platform]()
 
+loader = loaderclass.get(sys.platform, LibraryLoader)()
+
 def add_library_search_dirs(other_dirs):
     loader.other_dirs = other_dirs
 
 load_library = loader.load_library
 
-del loaderclass
\ No newline at end of file
+del loaderclass
Index: ctypesgencore/expressions.py
===================================================================
--- ctypesgencore/expressions.py	(revision 47)
+++ ctypesgencore/expressions.py	(working copy)
@@ -260,12 +260,15 @@
             return '((%s (%s)).value)' % (function,", ".join(arguments))
 
 # There seems not to be any reasonable way to translate C typecasts
-# into Python. Ctypesgen doesn't try.
+# into Python. Ctypesgen doesn't try, except for the special case of NULL.
 class TypeCastExpressionNode(ExpressionNode):
     def __init__(self, base, ctype):
         ExpressionNode.__init__(self)
         self.base = base
         self.ctype = ctype
+        self.isnull = isinstance(ctype, CtypesPointer) and \
+                      isinstance(base, ConstantExpressionNode) and \
+                      base.value == 0
     
     def visit(self,visitor):
         # No need to visit ctype because it isn't actually used
@@ -273,10 +276,16 @@
         ExpressionNode.visit(self,visitor)
     
     def evaluate(self,context):
-        return self.base.evaluate(context)
+        if self.isnull:
+            return None
+        else:
+            return self.base.evaluate(context)
     
     def py_string(self, can_be_ctype):
-        return self.base.py_string(can_be_ctype)
+        if self.isnull:
+            return "None"
+        else:
+            return self.base.py_string(can_be_ctype)
 
 class UnsupportedExpressionNode(ExpressionNode):
     def __init__(self,message):
Index: ctypesgencore/parser/datacollectingparser.py
===================================================================
--- ctypesgencore/parser/datacollectingparser.py	(revision 47)
+++ ctypesgencore/parser/datacollectingparser.py	(working copy)
@@ -42,6 +42,7 @@
         nullmacro = ConstantDescription("NULL",null,("<built-in>",1))
         self.constants.append(nullmacro)
         self.all.append(nullmacro)
+        self.output_order.append(("constant", nullmacro))
         
         # A list of tuples describing macros; saved to be processed after
         # everything else has been parsed