1 files changed, 22 insertions, 0 deletions
diff --git a/Library/Formula/py2cairo.rb b/Library/Formula/py2cairo.rb
index 93bbdf30c..c7b9e52a3 100644
--- a/Library/Formula/py2cairo.rb
+++ b/Library/Formula/py2cairo.rb
@@ -8,6 +8,11 @@ class Py2cairo < Formula
   depends_on 'cairo'
   depends_on :x11
 
+  fails_with :llvm do
+    build 2336
+    cause "The build script will set -march=native which llvm can't accept"
+  end
+
   def options
     [['--universal', 'Build universal binaries']]
   end
@@ -22,7 +27,24 @@ class Py2cairo < Formula
       end
     end
 
+    # waf miscompiles py2cairo on Lion, linking the wrong Python Library when
+    # HB Python is installed.  So add a LINKFLAG that sets the path to the real
+    # python Library as determined by `python-prefix`, where it gets used at
+    # link time and fixes the problem where you can't import cairo into Python.
+    # https://github.com/mxcl/homebrew/issues/12893
+    # https://bugs.freedesktop.org/show_bug.cgi?id=51544
+    ENV['LINKFLAGS'] = "-L#{%x(python-config --prefix).chomp}/lib"
     system "./waf", "configure", "--prefix=#{prefix}", "--nopyc", "--nopyo"
     system "./waf", "install"
   end
+
+  def caveats; <<-EOS.undent
+    For non-homebrew Python, you need to amend your PYTHONPATH like so:
+      export PYTHONPATH=#{HOMEBREW_PREFIX}/lib/#{which_python}/site-packages:$PYTHONPATH
+    EOS
+  end
+
+  def which_python
+    "python" + `python -c 'import sys;print(sys.version[:3])'`.strip
+  end
 end