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