Excise DL_EXPORT/DL_IMPORT from Modules/*.  Required adding a prototype
for Py_Main().

Thanks to Kalle Svensson and Skip Montanaro for the patches.
diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c
index 88b439f..cbb0000 100644
--- a/Modules/mathmodule.c
+++ b/Modules/mathmodule.c
@@ -334,7 +334,7 @@
 "This module is always available.  It provides access to the\n"
 "mathematical functions defined by the C standard.");
 
-DL_EXPORT(void)
+PyMODINIT_FUNC
 initmath(void)
 {
 	PyObject *m, *d, *v;