+g++ afb-wsj1-test.cpp -lsystemd -lafbwsc -I /opt/AGL/include -L /opt/AGL/lib -pthread
+In file included from afb-wsj1-test.cpp:1:0:
+afb-wsj1.hpp:21:0: warning: "_GNU_SOURCE" redefined
+ #define _GNU_SOURCE
+
+<command-line>:0:0: note: this is the location of the previous definition
+
+