Allow requirements to specify env options

1 files changed, 12 insertions, 0 deletions

diff --git a/Library/Homebrew/dependencies.rb b/Library/Homebrew/dependencies.rb
index be6e0cf9d..8e6c7afdf 100644
--- a/Library/Homebrew/dependencies.rb
+++ b/Library/Homebrew/dependencies.rb
@@ -1,3 +1,5 @@
+require 'build_environment'
+
 ## This file defines dependencies and requirements.
 ##
 ## A dependency is a formula that another formula needs to install.
@@ -169,6 +171,10 @@ class Requirement
   # See X11Dependency
   def modify_build_environment; nil end
 
+  def env
+    @env ||= self.class.env
+  end
+
   def eql?(other)
     other.is_a? self.class and hash == other.hash
   end
@@ -181,6 +187,12 @@ class Requirement
     def fatal(val=nil)
       val.nil? ? @fatal : @fatal = val
     end
+
+    def env(*settings)
+      @env ||= BuildEnvironment.new
+      settings.each { |s| @env << s }
+      @env
+    end
   end
 end