Cairo: Don't build with XCB support on Leopard

The version of XCB included with Leopard is too old to build against.

1 files changed, 8 insertions, 4 deletions

diff --git a/Library/Formula/cairo.rb b/Library/Formula/cairo.rb
index 19e989f2b..381c5ee94 100644
--- a/Library/Formula/cairo.rb
+++ b/Library/Formula/cairo.rb
@@ -14,10 +14,14 @@ class Cairo < Formula
   fails_with_llvm "Throws an 'lto could not merge' error during build.", :build => 2336
 
   def install
-    system "./configure", "--disable-dependency-tracking",
-                          "--prefix=#{prefix}",
-                          "--with-x",
-                          "--enable-xcb"
+    args = %W[
+      --disable-dependency-tracking
+      --prefix=#{prefix}
+      --with-x
+    ]
+    args << '--enable-xcb' unless MacOS.leopard?
+
+    system "./configure", *args
     system "make install"
   end
 end