From c5176898b5186e1eddae93aad2b15d401b4a9777 Mon Sep 17 00:00:00 2001
From: Yurii Rashkovskii <yrashk@gmail.com>
Date: Sun, 31 Jul 2011 19:58:35 -0700
Subject: [PATCH] Build Erlang driver as a 64 bit or 32 bit binary basing on
 installed Erlang's word size

---
 lib/erl/Makefile | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/erl/Makefile b/lib/erl/Makefile
index f507bbe..8f08e50 100644
--- a/lib/erl/Makefile
+++ b/lib/erl/Makefile
@@ -3,7 +3,14 @@ OS := $(shell uname)
 CFLAGS := -O3 -Wall -fPIC
 
 ifeq ($(OS), Darwin)
-	LD_FLAGS := -shared -undefined suppress -flat_namespace -m32
+	LD_FLAGS := -shared -undefined suppress -flat_namespace 
+  ERLWS:=$(shell erl -noshell -eval "io:format(\"~p\",[erlang:system_info(wordsize)])" -s erlang halt)
+
+  ifeq ($(ERLWS), 4)
+	  LD_FLAGS := $(LD_FLAGS) -m32
+  else
+  	LD_FLAGS := $(LD_FLAGS) -m64
+  endif
 else
 	LD_FLAGS := -shared -fPIC
 endif