--- openbabel-2.3.1/scripts/ruby/extconf.rb.gcc47	2011-01-11 23:53:32.000000000 +0900

+++ openbabel-2.3.1/scripts/ruby/extconf.rb	2012-04-05 14:15:14.286842274 +0900

@@ -3,11 +3,13 @@

 # Compensate for the fact that Ruby will try to build universal

 # binaries on OS X by default

 require 'rbconfig'

+darwin_ldflags = ""

 if Config::CONFIG["arch"] =~ /universal-darwin/

   ENV['ARCHFLAGS'] = case `uname -smr`.chomp

     when "i386" then '-arch i386'

     when "ppc"  then '-arch ppc'

   end

+  darwin_ldflags = "-flat_namespace"

 end

 require 'mkmf'

@@ -36,7 +38,7 @@

 end

 if have_library('openbabel')

-  with_ldflags("#$LDFLAGS -dynamic -flat_namespace") do #Enables cc to handle linking better.

+  with_ldflags("#$LDFLAGS -dynamic #$darwin_ldflags") do #Enables cc to handle linking better.

   create_makefile('openbabel')

 end

 else