--- a/tests/python/c_code@c_ext/cfile.xml	Fri Apr 03 17:08:13 2015 +0200
+++ b/tests/python/c_code@c_ext/cfile.xml	Mon Jun 15 10:19:52 2015 +0200
@@ -14,6 +14,7 @@
 volatile char PtoC=1,CtoP=2;
 
 extern long AtomicCompareExchange(long*,long, long);
+extern char *PLCID;
 
 int Simple_C_Call(int val){
   return val+1;
@@ -34,6 +35,7 @@
     res=1;
   }
   printf("C code called by Python: toC %d fromC %d\n",toC,*fromC);
+  printf("PLCID id %s\n",PLCID);
   return res;
 }