From 6a378a3a7a6862e7402a6341f6cfb0ecf7a6824d Mon Sep 17 00:00:00 2001
From: Shinichiro Hamaji <hamaji@google.com>
Date: Thu, 19 Nov 2015 18:30:21 +0900
Subject: [PATCH] Prevent findleaves.py from traversing copies of $(OUT_DIR)

by putting blank Android.mk and CleanSpec.mk in $(OUT_DIR).

Bug: 25732342
Change-Id: I3fcc4efddb9ee5ce309502e978f0589335af8371
---
 core/main.mk | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/core/main.mk b/core/main.mk
index 2bd316306..d9ff68e02 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -113,6 +113,11 @@ ifndef BUILDING_WITH_NINJA
 $(shell rm -f $(OUT_DIR)/ninja_build)
 endif
 
+# With these files findleaves.py won't be unnecessarily slower even if
+# there is a user creates a copy of $(OUT_DIR).
+$(shell echo '# This file prevents findleaves.py from traversing this directory further' > $(OUT_DIR)/Android.mk)
+$(shell echo '# This file prevents findleaves.py from traversing this directory further' > $(OUT_DIR)/CleanSpec.mk)
+
 # Write the build number to a file so it can be read back in
 # without changing the command line every time.  Avoids rebuilds
 # when using ninja.
-- 
2.11.0