execute `luarocks install cutorch`

[nicholaswhf]

Installing https://raw.githubusercontent.com/torch/rocks/master/cutorch-scm-1.rockspec...
Using https://raw.githubusercontent.com/torch/rocks/master/cutorch-scm-1.rockspec... switching to 'build' mode
正克隆到 'cutorch'...
remote: Enumerating objects: 229, done.
remote: Counting objects: 100% (229/229), done.
remote: Compressing objects: 100% (184/184), done.
remote: Total 229 (delta 62), reused 90 (delta 43), pack-reused 0
接收对象中: 100% (229/229), 241.83 KiB | 132.00 KiB/s, 完成.
处理 delta 中: 100% (62/62), 完成.
检查连接... 完成。
Warning: unmatched variable LUALIB

jopts=$(getconf _NPROCESSORS_CONF)

echo "Building on $jopts cores"
cmake -E make_directory build && cd build && cmake .. -DLUALIB= -DLUA_INCDIR=/home/whf/torch/install/include -DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS} -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH="/home/whf/torch/install/bin/.." -DCMAKE_INSTALL_PREFIX="/home/whf/torch/install/lib/luarocks/rocks/cutorch/scm-1" && make -j$jopts install

Building on 4 cores
-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is GNU 5.4.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found Torch7 in /home/whf/torch/install
CMake Error at /usr/share/cmake-3.5/Modules/FindCUDA.cmake:617 (message):
Specify CUDA_TOOLKIT_ROOT_DIR
Call Stack (most recent call first):
CMakeLists.txt:7 (FIND_PACKAGE)

-- Configuring incomplete, errors occurred!
See also "/tmp/luarocks_cutorch-scm-1-6454/cutorch/build/CMakeFiles/CMakeOutput.log".

Error: Build error: Failed building.

[TjebbeVQ]

Got same error - fixed by installing nvidia-cuda-toolkit