From: Ghislain Antony Vaillant <ghisvail@gmail.com>
Date: Thu, 15 Dec 2016 21:04:34 +0000
Subject: Use system libjsoncpp

---
 tests/CMakeLists.txt | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 2c45550..60bb40b 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -155,7 +155,13 @@ include_directories(${ZMQ_INCLUDE_DIRS})
 
 ################### JSONCPP #####################
 # Include jsoncpp headers (needed for JSON parsing)
-include_directories("../thirdparty/jsoncpp/include")
+if (USE_SYSTEM_JSONCPP)
+	find_package(JsonCpp REQUIRED)
+	include_directories(${JSONCPP_INCLUDE_DIRS})
+else ()
+	message("Using embedded JsonCpp")
+	include_directories("../thirdparty/jsoncpp/include")
+endif ()
 
 IF (NOT DISABLE_TESTS)
 	###############  SET TEST SOURCE FILES  #################