Python init function changes name depending on Python 2 vs 3

xbob/extension/__init__.py

@@ -6,6 +6,7 @@
 """A custom build class for Pkg-config based extensions
 """
 
+import sys
 import platform
 from .pkgconfig import pkgconfig
 from distutils.extension import Extension as DistutilsExtension
@@ -83,9 +84,13 @@ def generate_self_macros(extname, version):
   retval = [
       ('XBOB_EXT_MODULE_PREFIX', '"%s"' % s[0]),
       ('XBOB_EXT_MODULE_NAME', '"%s"' % s[1]),
-      ('XBOB_EXT_ENTRY_NAME', 'init%s' % s[1]),
       ]
 
+  if sys.version_info[0] >= 3:
+    retval.append(('XBOB_EXT_ENTRY_NAME', 'PyInit_%s' % s[1]))
+  else:
+    retval.append(('XBOB_EXT_ENTRY_NAME', 'init%s' % s[1]))
+
   if version: retval.append(('XBOB_EXT_MODULE_VERSION', '"%s"' % version))
 
   return retval