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/threadmodule.c b/Modules/threadmodule.c
index b872dd0..896d4fa 100644
--- a/Modules/threadmodule.c
+++ b/Modules/threadmodule.c
@@ -360,7 +360,7 @@
unlock it. A thread attempting to lock a lock that it has already locked\n\
will block until another thread unlocks it. Deadlocks may ensue.");
-DL_EXPORT(void)
+PyMODINIT_FUNC
initthread(void)
{
PyObject *m, *d;