Patch from Lorenzo M. Catucci:
I discovered the [MREMAP_MAYMOVE] symbol is only defined when _GNU_SOURCE is
defined; therefore, here is the change: if we are compiling for linux,
define _GNU_SOURCE before including mman.h, and all is done.
diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c
index 4b18466..5e8c562 100644
--- a/Modules/mmapmodule.c
+++ b/Modules/mmapmodule.c
@@ -16,6 +16,11 @@
/ ftp://squirl.nightmare.com/pub/python/python-ext.
*/
+#ifdef __linux__
+#define _GNU_SOURCE /* So we can get MREMAP_MAYMOVE defined when
+ sys/mman.h is included */
+#endif
+
#include <Python.h>
#ifndef MS_WIN32