From 4ab91a93e8a895fd8c2f9b4523c3129110def8fc Mon Sep 17 00:00:00 2001
From: Yang Tse <yangsita@gmail.com>
Date: Wed, 7 Feb 2007 17:34:30 +0000
Subject: AIX xlc has to have strict aliasing turned off. If not, the optimizer
 assumes that pointers can only point to an object of the same type.

---
 configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure.ac b/configure.ac
index 5e16564ea..dcc53dc6d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1459,6 +1459,10 @@ if test "x$RECENTAIX" = "xyes"; then
          XLC="yes"
          AC_MSG_RESULT([yes])
          CFLAGS="$CFLAGS -qthreaded"
+         dnl AIX xlc has to have strict aliasing turned off. If not,
+         dnl the optimizer assumes that pointers can only point to
+         dnl an object of the same type.
+         CFLAGS="$CFLAGS -qnoansialias"
        )
 
 
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