diff -r 6f23aba03281 -r baa61856643b kconfig/Makefile
--- a/kconfig/Makefile	Tue Jul 31 23:04:49 2012 +0200
+++ b/kconfig/Makefile	Sun Jan 05 19:25:54 2014 +0100
@@ -84,7 +84,7 @@
 
 zconf.hash.c: zconf.gperf
 	@echo "  GPERF  '$@'"
-	@gperf < $< > $@
+	@$(gperf) < $< > $@
 
 lex.zconf.c: zconf.l
 	@echo "  LEX    '$@'"