chuck: fix build on 10.9

Fixes #26519.

1 files changed, 9 insertions, 0 deletions

diff --git a/Library/Formula/chuck.rb b/Library/Formula/chuck.rb
index 22d5f4f4a..4d8e39992 100644
--- a/Library/Formula/chuck.rb
+++ b/Library/Formula/chuck.rb
@@ -7,6 +7,15 @@ class Chuck < Formula
 
   def install
     cd "src" do
+      # On 10.9, chuck fails to set flags to link against the
+      # private framework it needs
+      # See: https://github.com/Homebrew/homebrew/issues/26519
+      inreplace 'makefile.osx' do |s|
+        s.change_make_var! 'LINK_EXTRAS',
+          '-F/System/Library/PrivateFrameworks -weak_framework MultitouchSupport'
+        s.remove_make_var! 'ISYSROOT'
+      end
+
       system "make osx"
       bin.install "chuck"
     end