Made it build on EPICS 3.14.12.6, all unit tests pass.

tools/put.cpp

@@ -134,7 +134,7 @@ int main(int argc, char *argv[])
                         std::cerr<<"Error "<<typeid(e).name()<<" : "<<e.what()<<"\n";
                         ret=1;
                     }
-                    done.trigger();
+                    done.signal();
                 })
                 .exec();