title: Theano missing nvcc compiler
body: <p>I install theano on ubuntu 14.04 using below commands  : </p>
  
  <pre><code>sudo apt-get install python3-numpy python3-scipy python3-dev python3-pip python3-nose g++ libopenblas-dev git
  
  sudo pip install Theano
  </code></pre>
  
  <p>I have installed cuda7.5. If I run <code>ncvv --version</code>, I get below message : </p>
  
  <pre><code>nvcc: NVIDIA (R) Cuda compiler driver
  Copyright (c) 2005-2015 NVIDIA Corporation
  Built on Tue_Aug_11_14:27:32_CDT_2015
  Cuda compilation tools, release 7.5, V7.5.17
  </code></pre>
  
  <p>I cannot use theano gpu version. My command and error message is here : </p>
  
  <pre><code>$sudo THEANO_FLAGS=mode=FAST_RUN,device=gpu,floatX=float32 python test1.py
  
  ERROR (theano.sandbox.cuda): nvcc compiler not found on $PATH. Check your nvcc installation and try again.
  
  [Elemwise{exp,no_inplace}(&lt;TensorType(float32, vector)&gt;)]
  Looping 1000 times took 2.507168 seconds
  Result is [ 1.23178029  1.61879337  1.52278066 ...,  2.20771813  2.29967761
    1.62323284]
  Used the cpu
  </code></pre>