Index: build/ac-macros/swig.m4
===================================================================
--- build/ac-macros/swig.m4.orig	2012-05-11 22:37:59.000000000 +0100
+++ build/ac-macros/swig.m4	2012-05-11 22:38:27.000000000 +0100
@@ -187,7 +187,7 @@ AC_DEFUN(SVN_FIND_SWIG,
     for var_name in arch archdir CC LDSHARED DLEXT LIBS LIBRUBYARG \
                     rubyhdrdir sitedir sitelibdir sitearchdir libdir
     do
-      rbconfig_tmp=`$rbconfig "print Config::CONFIG@<:@'$var_name'@:>@"`
+      rbconfig_tmp=`$rbconfig "print RbConfig::CONFIG@<:@'$var_name'@:>@"`
       eval "rbconfig_$var_name=\"$rbconfig_tmp\""
     done
 
Index: configure.ac
===================================================================
--- configure.ac.orig	2012-05-11 22:37:59.000000000 +0100
+++ configure.ac	2012-05-11 22:55:02.000000000 +0100
@@ -1121,12 +1121,12 @@ if test "$RUBY" != "none"; then
       AC_PATH_PROGS(RDOC, rdoc rdoc1.8 rdoc18, none)
     fi
     AC_CACHE_CHECK([for Ruby major version], [svn_cv_ruby_major],[
-    svn_cv_ruby_major="`$RUBY -rrbconfig -e 'print Config::CONFIG.fetch(%q(MAJOR))'`"
+    svn_cv_ruby_major="`$RUBY -rrbconfig -e 'print RbConfig::CONFIG.fetch(%q(MAJOR))'`"
     ])
     RUBY_MAJOR="$svn_cv_ruby_major"
 
     AC_CACHE_CHECK([for Ruby minor version], [svn_cv_ruby_minor],[
-    svn_cv_ruby_minor="`$RUBY -rrbconfig -e 'print Config::CONFIG.fetch(%q(MINOR))'`"
+    svn_cv_ruby_minor="`$RUBY -rrbconfig -e 'print RbConfig::CONFIG.fetch(%q(MINOR))'`"
     ])
     RUBY_MINOR="$svn_cv_ruby_minor"