Build broken with master?

[sidharthms]

Here's the error log:

-- Found Torch7 in ...
-- CUDNN_INSTALL: Installing CUDNN 5.1, lib:.../torch/install/lib, inc:.../torch/install/include, bin:.../torch/install/bin
CMake Error at cmake/FindCUDNN.cmake:97 (get_filename_component):
  get_filename_component unknown component DIRECTORY
Call Stack (most recent call first):
  CMakeLists.txt:17 (CUDNN_INSTALL)


-- Found CUDNN: .../torch/install/lib/libcudnn.so.5 (found suitable exact version "5") 
-- Configuring incomplete, errors occurred!

Error: Build error: Failed building.

However, I was able to get it to install by reverting to commit 93d17a1

[ngimel]

Looks like it's breaking on DIRECTORY, perhaps your CMake is <= 2.8.11?
https://cmake.org/cmake/help/v3.0/command/get_filename_component.html
@shivak, can you please fix your commit so that it does not break for older CMakes?