Stop defining NDEBUG in Python.h, because it can interfere with
extensions that #include Python.h. See (rejected) patch 487634 for
more detail. I'll open a new bug report for the rest needed here.
diff --git a/Include/Python.h b/Include/Python.h
index c0eed94..0f07e36 100644
--- a/Include/Python.h
+++ b/Include/Python.h
@@ -50,11 +50,10 @@
#include <stdlib.h>
#endif
-#ifndef Py_DEBUG
-#ifndef NDEBUG
-#define NDEBUG 1
-#endif
-#endif
+/* CAUTION: Build setups should ensure that NDEBUG is defined on the
+ * compiler command line when building Python in release mode; else
+ * assert() calls won't be removed.
+ */
#include <assert.h>
#include "pyport.h"