including headers, don't need actual linking since no use of gst library

CMakeLists.txt

@@ -2,6 +2,11 @@ cmake_minimum_required(VERSION 3.15)
 
 project(HelloWorld)
 
+# gstreamer-1.0
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GST REQUIRED gstreamer-1.0)
+include_directories(${GST_INCLUDE_DIRS})
+
 set(CMAKE_CXX_STANDARD 14)
 
 set (source_dir "./src")