diff -r b7e64be81c8a -r 4fb877dfe5c4 common/autoconf/platform.m4
--- a/common/autoconf/platform.m4	Thu Aug 08 10:10:24 2013 -0700
+++ b/common/autoconf/platform.m4	Thu Aug 15 17:14:53 2013 +0200
@@ -412,17 +412,16 @@
 [
   # keep track of c/cxx flags that we added outselves...
   #   to prevent emitting warning...
-  ADDED_CFLAGS=" -m${OPENJDK_TARGET_CPU_BITS}"
-  ADDED_CXXFLAGS=" -m${OPENJDK_TARGET_CPU_BITS}"
-  ADDED_LDFLAGS=" -m${OPENJDK_TARGET_CPU_BITS}"
+  TARGET_BITS_FLAG="-m${OPENJDK_TARGET_CPU_BITS}"
+  AC_SUBST(TARGET_BITS_FLAG)
 
-  CFLAGS="${CFLAGS}${ADDED_CFLAGS}"
-  CXXFLAGS="${CXXFLAGS}${ADDED_CXXFLAGS}"
-  LDFLAGS="${LDFLAGS}${ADDED_LDFLAGS}"
+  CFLAGS="${CFLAGS} ${TARGET_BITS_FLAG}"
+  CXXFLAGS="${CXXFLAGS} ${TARGET_BITS_FLAG}"
+  LDFLAGS="${LDFLAGS} ${TARGET_BITS_FLAG}"
 
-  CFLAGS_JDK="${CFLAGS_JDK}${ADDED_CFLAGS}"
-  CXXFLAGS_JDK="${CXXFLAGS_JDK}${ADDED_CXXFLAGS}"
-  LDFLAGS_JDK="${LDFLAGS_JDK}${ADDED_LDFLAGS}"
+  CFLAGS_JDK="${CFLAGS_JDK} ${TARGET_BITS_FLAG}"
+  CXXFLAGS_JDK="${CXXFLAGS_JDK} ${TARGET_BITS_FLAG}"
+  LDFLAGS_JDK="${LDFLAGS_JDK} ${TARGET_BITS_FLAG}"
 ])
 
 AC_DEFUN_ONCE([PLATFORM_SETUP_OPENJDK_TARGET_BITS],