--- qemu-1.6.0/configure
+++ qemu-1.6.0/configure
@@ -973,8 +973,13 @@
            cc_i386='$(CC) -m32'
            ;;
     x86_64)
-           CPU_CFLAGS="-m64"
-           LDFLAGS="-m64 $LDFLAGS"
+           if check_define __ILP32__ ; then
+               CPU_CFLAGS="-mx32"
+               LDFLAGS="-mx32 $LDFLAGS"
+           else
+               CPU_CFLAGS="-m64"
+               LDFLAGS="-m64 $LDFLAGS"
+           fi
            cc_i386='$(CC) -m32'
            ;;
     # No special flags required for other host CPUs