Use gcc-mp-4.4 to build TSan on Mac....

scripts/common.sh

 #!/bin/sh
 
 # Copyright (c) 2009-2010 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This script contains some functions useful to build
 # Valgrind and ThreadSanitizer for use with chromium
 
 THISDIR=$(dirname "${0}")
@@ skipping 184 matching lines @@
 }
 
 build_valgrind_for_available_platforms() {
   case `uname -sm` in
     "Linux x86_64")
       # We can build both 64/32-bit and 32-bit Valgrinds
       build_valgrind "linux_x64"
       build_valgrind "linux_x86" "--enable-only32bit"
       ;;
     "Darwin i386")
-      if [ `uname -r` != "9.7.0" ]; then
-        echo "You have Darwin kernel different than 9.7.0"
-        echo "We've tested binaries built on 9.7.0 to work with 9.6.1, 9.7.0 and 9.8.0"
+      if uname -r | grep 9\.[0-9]\.[0-9] >/dev/null
+      then
+        build_valgrind "mac"
+      else
+        echo "You have Darwin kernel different from 9.X.X" >&2
+        echo "Please, don't put the resulting binaries into Chromium SVN" >&2
         build_valgrind "local"
-      else
-        build_valgrind "mac"
       fi
       ;;
     *)
       build_valgrind "local"
       ;;
   esac
 }
 
 # Check that the binaries directory exists.
 BINARIES_DIR="$THISDIR/../binaries"
 if ! [ -a $BINARIES_DIR ]
 then
   echo "Error: $BINARIES_DIR doesn't exist!"
   exit 1
 fi
 
 set -e
 set -x