only train in cpu, not gpu

[rzhangpku]

when I run
`
PATH="/usr/local/cuda/bin/:$PATH"
export LD_LIBRARY_PATH=/usr/local/cuda/lib64/
export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:~/anaconda3/lib"
export CUDA_ROOT=/usr/local/cuda
export floatX=float32
export THEANO_FLAGS=mode=FAST_RUN,device=cuda,floatX=float32
export OMP_NUM_THREADS=8

nmt-train -c ~/Documents/Stage/GAN_NMT_model/attention_en-fr.conf`
It is only trained in cpu, not gpu.
Please help me, any advice will be helpful.