From e52cc75f072fa604c840e1ef9ae2a2418d6d222f Mon Sep 17 00:00:00 2001
From: Neil Roberts <neil@linux.intel.com>
Date: Tue, 15 Feb 2011 12:36:58 +0000
Subject: [PATCH] configure.ac: Add -Wpointer-arith to the maintainer CFLAGS

GCC by default allows pointer arithmetic on void* pointers and treats
them as having a size of 1 byte. This is non-standard behaviour and
causes errors on some compilers so we should try to avoid
it. -Wpointer-arith warns about these cases.
---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 09ef918ab..93e309895 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1096,7 +1096,8 @@ AC_ARG_ENABLE([maintainer-flags],
 MAINTAINER_COMPILER_FLAGS="-Wall -Wshadow -Wcast-align -Wuninitialized
                            -Wno-strict-aliasing -Wempty-body -Wformat
                            -Wformat-security -Winit-self
-                           -Wdeclaration-after-statement -Wvla"
+                           -Wdeclaration-after-statement -Wvla
+                           -Wpointer-arith"
 
 AS_CASE([$enable_maintainer_flags],
         [yes],