Index: config.h.in
===================================================================
--- config.h.in	(revision 23109)
+++ config.h.in	(revision 23110)
@@ -273,6 +273,7 @@
 #		define system      never_use_system__use_pcb_system
 #		define remove      never_use_remove__use_pcb_remove
 #		define rename      never_use_rename__use_pcb_rename
+#		define mkdir       never_use_mkdir__use_pcb_mkdir
 #	endif
 
 #endif