From a1a81daffca376e0f9dff1754eb354e162c98686 Mon Sep 17 00:00:00 2001
From: Misty De Meo
Date: Sun, 17 Apr 2016 14:34:18 -0700
Subject: XQuartz: detect Tiger's prefix

---
 Library/Homebrew/os/mac/xquartz.rb | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'Library')

diff --git a/Library/Homebrew/os/mac/xquartz.rb b/Library/Homebrew/os/mac/xquartz.rb
index 6ac970b18..3147dc1df 100644
--- a/Library/Homebrew/os/mac/xquartz.rb
+++ b/Library/Homebrew/os/mac/xquartz.rb
@@ -99,6 +99,9 @@ module OS
           Pathname.new("/opt/X11")
         elsif Pathname.new("/usr/X11/lib/libpng.dylib").exist?
           Pathname.new("/usr/X11")
+        # X11 doesn't include libpng on Tiger
+        elsif Pathname.new("/usr/X11R6/lib/libX11.dylib").exist?
+          Pathname.new("/usr/X11R6")
         end
       end
 
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