--- ruby-1.8.2/ext/tcltklib/extconf.rb.lib64	2004-12-23 05:16:43.000000000 +0100
+++ ruby-1.8.2/ext/tcltklib/extconf.rb	2004-12-31 15:21:13.024301329 +0100
@@ -18,6 +18,11 @@
   have_library("m", "log") 
 end
 
+$lib = "lib"
+if RUBY_PLATFORM =~ /x86_64-linux/
+  $lib = "lib64"
+end
+
 dir_config("tk")
 dir_config("tcl")
 dir_config("X11")
@@ -27,7 +32,7 @@
 stubs = enable_config("tcltk_stubs") || with_config("tcltk_stubs")
 
 def find_tcl(tcllib, stubs)
-  paths = ["/usr/local/lib", "/usr/pkg/lib", "/usr/lib"]
+  paths = ["/usr/local/"+$lib, "/usr/pkg/"+$lib, "/usr/"+$lib]
   if stubs
     func = "Tcl_InitStubs"
     lib = "tclstub"
@@ -50,7 +55,7 @@
 end
 
 def find_tk(tklib, stubs)
-  paths = ["/usr/local/lib", "/usr/pkg/lib", "/usr/lib"]
+  paths = ["/usr/local/"+$lib, "/usr/pkg/"+$lib, "/usr/"+$lib]
   if stubs
     func = "Tk_InitStubs"
     lib = "tkstub"
@@ -243,7 +248,7 @@
 if mac_need_framework || 
    (have_header("tcl.h") && have_header("tk.h") &&
     (is_win32 || find_library("X11", "XOpenDisplay",
-      "/usr/X11/lib", "/usr/lib/X11", "/usr/X11R6/lib", "/usr/openwin/lib")) &&
+      "/usr/X11/"+$lib, "/usr/"+$lib+"/X11", "/usr/X11R6/"+$lib, "/usr/openwin/"+$lib)) &&
     find_tcl(tcllib, stubs) &&
     find_tk(tklib, stubs))
   $CPPFLAGS += ' -DUSE_TCL_STUBS -DUSE_TK_STUBS' if stubs