Index: slub/Makefile
===================================================================
--- slub.orig/Makefile	2007-06-11 16:08:54.000000000 -0700
+++ slub/Makefile	2007-06-11 16:11:01.000000000 -0700
@@ -198,7 +198,7 @@ CONFIG_SHELL := $(shell if [ -x "$$BASH"
 HOSTCC       = gcc
 HOSTCXX      = g++
 HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
-HOSTCXXFLAGS = -O2
+HOSTCXXFLAGS = -O2 -m64
 
 # Decide whether to build built-in, modular, or both.
 # Normally, just do built-in.