From 1b0647d747c457b2faff1df225f9e8701482bcd1 Mon Sep 17 00:00:00 2001
From: Mike McQuaid
Date: Mon, 5 May 2014 13:39:10 +0100
Subject: shared: don't use Formula.factory unnecessarily.

Instead check if the path exists by using opt.
---
 Library/Homebrew/extend/ENV/shared.rb | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/Library/Homebrew/extend/ENV/shared.rb b/Library/Homebrew/extend/ENV/shared.rb
index 31904c280..d0102f520 100644
--- a/Library/Homebrew/extend/ENV/shared.rb
+++ b/Library/Homebrew/extend/ENV/shared.rb
@@ -98,9 +98,7 @@ module SharedEnvExtension
         end
       end
     elsif ARGV.include? '--use-gcc'
-      gcc_installed = Formula.factory('apple-gcc42').installed? rescue false
-      # fall back to something else on systems without Apple gcc
-      if MacOS.locate('gcc-4.2') || gcc_installed
+      if MacOS.locate("gcc-4.2") || HOMEBREW_PREFIX.join("opt/apple-gcc42/bin/gcc-4.2").exist?
         :gcc
       else
         raise "gcc-4.2 not found!"
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