diff -r 76ed5454b09d PC/python3defgen.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PC/python3defgen.py	Thu Apr 09 22:41:00 2015 -0500
@@ -0,0 +1,91 @@
+import os
+import re
+import sys
+from importlib.machinery import SourceFileLoader
+
+src_root = os.path.dirname(os.path.dirname(__file__))
+clinic_cpp_path = os.path.join(src_root, 'Tools', 'clinic', 'cpp.py')
+
+clinic_cpp = SourceFileLoader('cpp', clinic_cpp_path).load_module()
+
+header = """\
+; This file specifies the import forwarding for python3.dll
+; It is used when building python3dll.vcxproj
+; Generated by python3defgen.py, DO NOT modify directly!
+LIBRARY	"python3"
+EXPORTS
+"""
+
+version_limited_re = re.compile(r'Py_LIMITED_API\s*\+\s*0\s*>')
+
+class Parser(clinic_cpp.Monitor):
+    def is_for_windows(self):
+        for token, condition in self.stack:
+            if "!defined(MS_WINDOWS)" in condition:
+                return False
+        else:
+            return True
+
+    def is_limited(self):
+        # if 'abstract.h' in self.filename:
+        #     print(self.stack)
+        for token, condition in self.stack:
+            if version_limited_re.search(condition):
+                return True
+            if "!defined(Py_LIMITED_API)" in condition:
+                return False
+            if "defined(Py_LIMITED_API)" in condition:
+                return True
+        else:
+            return True
+
+func_re = re.compile(r'PyAPI_FUNC\(.+\)\s*(_?Py\w+)\(')
+data_re = re.compile(r'PyAPI_DATA\(.+\).*?(_?Py\w+)')
+
+exports = {}
+
+for fn in os.listdir(os.path.join(src_root, 'Include')):
+    if fn == 'pgenheaders.h':
+        # special case to skip couple of unavoidable duplicates
+        continue
+    fn = os.path.join(src_root, 'Include', fn)
+    with open(fn) as f:
+        parser = Parser(fn)
+        for lineno, line in enumerate(f):
+            parser.writeline(line)
+            if (parser.in_comment or
+                    not parser.is_limited() or
+                    not parser.is_for_windows()):
+                continue
+            export = None
+            m = func_re.search(line)
+            if m is not None:
+                export = m.group(1)
+                type = 'func'
+            else:
+                m = data_re.search(line)
+                if m is not None:
+                    export = m.group(1)
+                    type = 'data'
+            if export is not None:
+                if export not in exports:
+                    exports[export] = [(type, fn, lineno)]
+                else:
+                    exports[export].append((type, fn, lineno))
+
+lines = []
+for name, occurrances in exports.items():
+    if len(occurrances) > 1:
+        print('Duplicates found:')
+        for type, fn, lineno in occurrances:
+            print('  {} {}, {}:{}'.format(type, name, fn, lineno))
+    type = occurrances[0][0]
+    if type == 'func':
+        lines.append('  {0}=python35.{0}\n'.format(name))
+    elif type == 'data':
+        lines.append('  {0}=python35.{0} DATA\n'.format(name))
+
+with open(os.path.join(os.path.dirname(__file__), 'python3.def.tmp'), 'w') as f:
+    f.write(header)
+    f.writelines(sorted(lines))
+    f.write('\n')