--- Makefile	2017-09-17 12:56:40.438810000 +0800
+++ Makefile.orig	2017-09-17 13:00:49.836286000 +0800
@@ -166,6 +166,7 @@ EXTRAS_COMMANDS+= \
 		clang-tidy \
 		find-all-symbols \
 		modularize \
+		pp-trace
 
 EXTRAS_LIBS=	libclangApplyReplacements \
 		libclangChangeNamespace \