--- tcltcc-0.4.orig/tcc.tcl	2007-11-07 10:04:42.000000000 -0600
+++ tcltcc-0.4/tcc.tcl	2014-04-26 23:06:24.272645002 -0500
@@ -9,10 +9,15 @@
    variable commands
 
    set dir [file dirname [info script]]
-   switch -exact -- $::tcl_platform(platform) {
-	   windows { load $dir/tcc02.dll tcc }
-	   unix { load $dir/libtcc0.2.so tcc }
-	   default {error "unsupport platform"}
+   if {[info command ::tcc] == ""} {
+      catch { load {} tcc }
+   }
+   if {[info command ::tcc] == ""} {
+       switch -exact -- $::tcl_platform(platform) {
+	       windows { load $dir/tcc04.dll tcc }
+	       unix { load $dir/libtcc0.4.so tcc }
+	       default {error "unsupport platform"}
+       }
    }
    set libs $dir/lib
    set includes $dir/include
