From 1a7ba8e3939aeec0936e54d2ee2cae314c35afae Mon Sep 17 00:00:00 2001
From: Danila Fedorin <danila.fedorin@gmail.com>
Date: Sat, 18 Mar 2017 17:30:51 -0700
Subject: [PATCH] Exit CMakeLists if the library has already been defined. This
 is to prevent the re-use of this library in multiple projects.

---
 CMakeLists.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e9ae4be..2ef6728 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,9 @@
 cmake_minimum_required(VERSION 2.7)
+
+if(TARGET ds)
+  return()
+endif(TARGET ds)
+
 project(libds)
 
 set_property(GLOBAL PROPERTY C_STANDARD 90)