--- openbabel-2.3.2/scripts/CMakeLists.txt.rbconfig	2015-01-16 15:16:50.455454787 +0900
+++ openbabel-2.3.2/scripts/CMakeLists.txt	2015-01-16 15:19:56.608276116 +0900
@@ -308,7 +308,7 @@
         # no regex metacharacters except possibly '.':
         string(REGEX REPLACE ^${RUBY_POSSIBLE_LIB_DIR}/ruby ${RUBY_PREFIX} ruby_install_dir "${RUBY_SITEARCH_DIR}")
       else (RUBY_PREFIX)
-        execute_process(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print Config::CONFIG['exec_prefix']"
+        execute_process(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print RbConfig::CONFIG['exec_prefix']"
           OUTPUT_VARIABLE ruby_exec_prefix)
         # It is reasonably safe to assume that ruby_exec_prefix contains no
         # regex metacharacters except possibly '.':
--- openbabel-2.3.2/scripts/ruby/extconf.rb.rbconfig	2015-01-16 15:16:50.450454846 +0900
+++ openbabel-2.3.2/scripts/ruby/extconf.rb	2015-01-16 15:19:31.945564760 +0900
@@ -4,7 +4,7 @@
 # binaries on OS X by default
 require 'rbconfig'
 darwin_ldflags = ""
-if Config::CONFIG["arch"] =~ /universal-darwin/
+if RbConfig::CONFIG["arch"] =~ /universal-darwin/
   ENV['ARCHFLAGS'] = case `uname -smr`.chomp
     when "i386" then '-arch i386'
     when "ppc"  then '-arch ppc'