From c1366b111f866a2a4e03ce606b52f93b1de10fdb Mon Sep 17 00:00:00 2001
From: Jack Nagel
Date: Sun, 6 Apr 2014 18:39:29 -0500
Subject: Initialize cxxstdlib set lazily

This is used rarely and only at build-time, so we don't need to create
it when instantiating the formula.
---
 Library/Homebrew/formula.rb | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

(limited to 'Library')

diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 398f14413..49271b76d 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -26,10 +26,6 @@ class Formula
 
   attr_accessor :local_bottle_path
 
-  # Flag for marking whether this formula needs C++ standard library
-  # compatibility check
-  attr_reader :cxxstdlib
-
   # Homebrew determines the name
   def initialize name='__UNKNOWN__', path=self.class.path(name)
     @name = name
@@ -47,8 +43,6 @@ class Formula
     @pkg_version = PkgVersion.new(version, revision)
 
     @pin = FormulaPin.new(self)
-
-    @cxxstdlib = Set.new
   end
 
   def set_spec(name)
@@ -445,6 +439,12 @@ class Formula
     Requirement.expand(self, &block)
   end
 
+  # Flag for marking whether this formula needs C++ standard library
+  # compatibility check
+  def cxxstdlib
+    @cxxstdlib ||= Set.new
+  end
+
   def to_hash
     hsh = {
       "name" => name,
-- 
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