From cd504e49bcece187dee85b33e39f72b5eab53cda Mon Sep 17 00:00:00 2001
From: Davi Arnaut <davi.arnaut@oracle.com>
Date: Tue, 30 Nov 2010 21:07:55 -0200
Subject: [PATCH] Workaround a GCC warning about a pointer being cast to a
 larger integral type. Use intptr which is designed to hold pointer values and
 pass it to off_t.

mysys/stacktrace.c:
  Add a compile time assert to ensure that off_t is large enough
  to hold the pointer value.
---
 mysys/stacktrace.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mysys/stacktrace.c b/mysys/stacktrace.c
index b6bf88cf3e1..93e8ae6b508 100644
--- a/mysys/stacktrace.c
+++ b/mysys/stacktrace.c
@@ -87,8 +87,11 @@ static int safe_print_str(const char *addr, int max_len)
   if ((fd= open(buf, O_RDONLY)) < 0)
     return -1;
 
+  /* Ensure that off_t can hold a pointer. */
+  compile_time_assert(sizeof(off_t) >= sizeof(intptr));
+
   total= max_len;
-  offset= (off_t) addr;
+  offset= (intptr) addr;
 
   /* Read up to the maximum number of bytes. */
   while (total)