--- configure	2016-05-20 13:52:14.854090960 +0200
+++ configure.new	2016-05-20 13:52:08.764190358 +0200
@@ -226,9 +226,6 @@
             set success 0
         } else {
             puts $opt(tk_h)
-            if {$opt(tk_h) == "/usr/include"} {
-                set var(BASH_ENV) CPLUS_INCLUDE_PATH=/usr/include:/usr/local/include
-            }
         }
     }