From e4d97bef3defa4d4a346b2888159b12a9e76b43a Mon Sep 17 00:00:00 2001
From: Mahavir Jain <mahavir@espressif.com>
Date: Sun, 17 Mar 2019 21:33:22 +0800
Subject: [PATCH] make: use `shell` command to extract version string

---
 make/project.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/make/project.mk b/make/project.mk
index c214aa191..06c7e02da 100644
--- a/make/project.mk
+++ b/make/project.mk
@@ -329,7 +329,7 @@ endif
 ifeq ("$(wildcard ${IDF_PATH}/version.txt)","")
 IDF_VER_T := $(shell cd ${IDF_PATH} && git describe --always --tags --dirty)
 else
-IDF_VER_T := `cat ${IDF_PATH}/version.txt`
+IDF_VER_T := $(shell cat ${IDF_PATH}/version.txt)
 endif
 IDF_VER := $(shell echo "$(IDF_VER_T)"  | cut -c 1-31)