- rename configure.in to configure.ac
- change references from configure.in to configure.ac
diff --git a/pyconfig.h.in b/pyconfig.h.in
index 4567823..1c1968b 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -1,4 +1,4 @@
-/* pyconfig.h.in.  Generated from configure.in by autoheader.  */
+/* pyconfig.h.in.  Generated from configure.ac by autoheader.  */
 
 
 #ifndef Py_PYCONFIG_H
@@ -1102,6 +1102,9 @@
 /* This must be defined on some systems to enable large file support. */
 #undef _LARGEFILE_SOURCE
 
+/* This must be defined on AIX systems to enable large file support. */
+#undef _LARGE_FILES
+
 /* Define to 1 if on MINIX. */
 #undef _MINIX