From b38cda5eeb4e9ec3dc4099b0f6d80cfb2137ea3a Mon Sep 17 00:00:00 2001
From: Matias N <matias@protobits.dev>
Date: Wed, 25 Nov 2020 22:45:47 -0300
Subject: [PATCH] Config.mk: fix CATFILE macro to work when file list is empty
 (Linux)

Signed-off-by: chao.an <anchao@xiaomi.com>
Change-Id: I0d21aff60cc4e84ec5a85259cc7fc05c550d0926
---
 tools/Config.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/Config.mk b/tools/Config.mk
index 0e2aac9cab3..aa4dd29c366 100644
--- a/tools/Config.mk
+++ b/tools/Config.mk
@@ -463,7 +463,7 @@ define CATFILE
 endef
 else
 define CATFILE
-	$(Q) cat $(2) > $1
+	$(Q) if [ -z "$(strip $(2))" ]; then echo '' > $(1); else cat $(2) > $1; fi
 endef
 endif