From a892e52bfc441f267ee01511d7ee454de70a8350 Mon Sep 17 00:00:00 2001
From: Misty De Meo <mistydemeo@gmail.com>
Date: Thu, 1 Aug 2013 20:24:18 -0700
Subject: [PATCH] Add Hardware::CPU.universal_archs

---
 Library/Homebrew/os/mac/hardware.rb | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Library/Homebrew/os/mac/hardware.rb b/Library/Homebrew/os/mac/hardware.rb
index 05cd3da5e6..b0ac998224 100644
--- a/Library/Homebrew/os/mac/hardware.rb
+++ b/Library/Homebrew/os/mac/hardware.rb
@@ -1,3 +1,5 @@
+require 'mach'
+
 module MacCPUs
   OPTIMIZATION_FLAGS = {
     :penryn => '-march=core2 -msse4.1',
@@ -83,6 +85,18 @@ module MacCPUs
     type == :intel ? :x86_64 : :ppc64
   end
 
+  # Returns an array that's been extended with ArchitectureListExtension,
+  # which provides helpers like #as_arch_flags and #as_cmake_arch_flags.
+  def universal_archs
+    # Building 64-bit is a no-go on Tiger, and pretty hit or miss on Leopard.
+    # Don't even try unless Tigerbrew's experimental 64-bit Leopard support is enabled.
+    if MacOS.version <= :leopard and !MacOS.prefer_64_bit?
+      [arch_32_bit].extend ArchitectureListExtension
+    else
+      [arch_32_bit, arch_64_bit].extend ArchitectureListExtension
+    end
+  end
+
   def altivec?
     @altivec ||= sysctl_bool('hw.optional.altivec')
   end