Fix for graphviz/lion/homebrew

gistfile1.diff

diff --git a/Library/Formula/graphviz.rb b/Library/Formula/graphviz.rb
index 5a8557b..adf2033 100644
--- a/Library/Formula/graphviz.rb
+++ b/Library/Formula/graphviz.rb
@@ -12,6 +12,12 @@ class Graphviz < Formula
     depends_on 'cairo' if MacOS.leopard?
   end
 
+  if MacOS.lion?
+    depends_on 'gd'
+  end
+
+
+
   def options
     [["--with-pdf", "Build with Pango/Cairo to support native PDF output"]]
   end
diff --git a/Library/Formula/pango.rb b/Library/Formula/pango.rb
index 40fd2e2..d25ef03 100644
--- a/Library/Formula/pango.rb
+++ b/Library/Formula/pango.rb
@@ -15,6 +15,10 @@ class Pango < Formula
     depends_on 'cairo' # Leopard doesn't come with Cairo.
   end
 
+  if MacOS.lion?
+    depends_on 'cairo'
+  end
+
   def install
     system "./configure", "--prefix=#{prefix}", "--with-x"
     system "make install"
diff --git a/Library/Formula/pixman.rb b/Library/Formula/pixman.rb
index e284e56..499ca2d 100644
--- a/Library/Formula/pixman.rb
+++ b/Library/Formula/pixman.rb
@@ -8,6 +8,7 @@ class Pixman < Formula
   depends_on 'pkg-config' => :build
 
   def install
+    ENV.gcc_4_2
     system "./configure", "--disable-dependency-tracking",
                           "--prefix=#{prefix}",
                           "--enable-gtk=no" # Don't need to build tests