From 5f682934751d54263df19f3b181f1555158daf25 Mon Sep 17 00:00:00 2001
From: Hallvard Furuseth <hallvard@openldap.org>
Date: Sat, 10 Sep 2011 10:11:55 +0200
Subject: [PATCH] explain mdl_midl_sort() istack size

---
 libraries/libmdb/midl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libraries/libmdb/midl.c b/libraries/libmdb/midl.c
index 2aee431..7a7b59c 100644
--- a/libraries/libmdb/midl.c
+++ b/libraries/libmdb/midl.c
@@ -15,6 +15,7 @@
  * <http://www.OpenLDAP.org/license.html>.
  */
 
+#include <limits.h>
 #include <string.h>
 #include <sys/types.h>
 #include <assert.h>
@@ -134,7 +135,8 @@ int mdb_midl_append( IDL ids, ID id )
 void
 mdb_midl_sort( ID *ids )
 {
-	int istack[16*sizeof(int)];
+	/* Max possible depth of int-indexed tree * 2 items/level */
+	int istack[sizeof(int)*CHAR_BIT * 2];
 	int i,j,k,l,ir,jstack;
 	ID a, itmp;