Created by: guoshengCS

The compiling errors are as following:

/Users/baidu/Documents/codeRep/paddle-master/Paddle/paddle/gserver/layers/HierarchicalSigmoidLayer.cpp:167:9: error: address of function 'useGpu' will always evaluate to 'true' [-Werror,-Wpointer-bool-conversion]
    if (useGpu) {
    ~~  ^~~~~~
/Users/baidu/Documents/codeRep/paddle-master/Paddle/paddle/gserver/layers/HierarchicalSigmoidLayer.cpp:167:9: note: prefix with the address-of operator to silence this warning
    if (useGpu) {
        ^
        &
1 error generated.
make[2]: *** [paddle/gserver/CMakeFiles/paddle_gserver.dir/layers/HierarchicalSigmoidLayer.cpp.o] Error 1

It seems that useGpu_ rather than useGpu should be used here.