From 5efb0a9a33edba18c9b215cb4c2cee15174918c5 Mon Sep 17 00:00:00 2001
From: Varun B Patil <varun.basavaraj.patil@gmail.com>
Date: Tue, 28 Jan 2014 12:35:36 +0530
Subject: [PATCH] Attempt to detect OS arch(32/64 bit) on most platforms

Attempt to automatically detect 32bit or 64bit OS architecture in Makefile,
unless user has specified preference on the command line.
---
 Makefile | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 690fa322..a5bd524d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,5 @@
 UNAME=$(shell uname | tr A-Z a-z | tr -d \\-[:digit:].)
+ARCH=$(shell uname -m)
 LIBPREFIX=lib
 LIBSUFFIX=a
 CXX_O=-o $@
@@ -11,7 +12,11 @@ CFLAGS_M32=-m32
 CFLAGS_M64=-m64
 BUILDTYPE=Release
 
-
+ifeq (, $(ENABLE64BIT))
+ifeq ($(ARCH), x86_64)
+ENABLE64BIT=Yes
+endif
+endif
 
 ifeq (,$(wildcard ./gtest))
 HAVE_GTEST=No