Remove to_flags monkeypatch

Library/ENV/4.3/cc

@@ -232,7 +232,7 @@ class Cmd
     syslibpath
   end
   def ldflags
-    args = libpath.to_flags('-L')
+    args = path_flags("-L", libpath)
     case mode
     when :ld   then args << '-headerpad_max_install_names'
     when :ccld then args << '-Wl,-headerpad_max_install_names'
@@ -247,7 +247,7 @@ class Cmd
     sys, opt = cpath
     # we want our keg-only includes to be found before system includes *and*
     # before any other includes the build-system adds
-    sys.to_flags('-isystem') + opt.to_flags('-I')
+    path_flags("-isystem", sys) + path_flags("-I", opt)
   end
   def make_fuss args
     return unless make_fuss?
@@ -278,6 +278,10 @@ class Cmd
     path = path.realpath if path.exist?
     path.to_s
   end
+  def path_flags(prefix, paths)
+    paths = paths.uniq.select { |path| File.directory?(path) }
+    paths.map! { |path| prefix + path }
+  end
 end
 
 if __FILE__ == $PROGRAM_NAME

Library/ENV/libsuperenv.rb

@@ -13,9 +13,3 @@ class NilClass
   def chuzzle; end
   def split(x); [] end
 end
-
-class Array
-  def to_flags prefix
-    select { |path| File.directory? path }.uniq.map { |path| prefix + path }
-  end
-end