机器nvcc -V混淆上的多个CUDA版本 [英] Multiple CUDA versions on machine nvcc -V confusion

问题描述

我以前在计算机上安装了cuda-7.0，后来又卸载了cuda-7.0并安装了cuda-8.0。当我转到/ usr / local文件夹时，看到以下文件夹：

I used to have cuda-7.0 installed on my machine and later un-installed cuda-7.0 and installed cuda-8.0. When I go to my /usr/local folder I see the following folders:

/bin/
/cuda/
/cuda-7.0/
/cuda-8.0/
/etc/
/games/
/include/
/lib/
/lua/
/man/
/MATLAB/
/sbin/
/share/
/src/

我想我很困惑，因为/cuda/version.txt文件说它在cuda-8.0上，但是当我键入：

I guess I'm confused since the /cuda/version.txt file says it is on cuda-8.0, but when I type:

$ nvcc -V

它报告说我正在使用7.0版：

it reports that I'm using version 7.0:

nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2015 NVIDIA Corporation
Built on Mon_Feb_16_22:59:02_CST_2015
Cuda compilation tools, release 7.0, V7.0.27

令我困惑的是，即使我这样做：

What still puzzles me is that even if I do:

export LD_LIBRARY_PATH=/usr/local/cuda-8.0/lib64:$LD_LIBRARY_PATH
export PATH=$PATH:/usr/local/cuda-8.0/bin

在我键入 $ nvcc -V 之后，仍然会输出7.0版。

after I type $ nvcc -V , it still outputs version 7.0.

编辑：

$ which nvcc
/usr/local/cuda-7.0/bin/nvcc

$ echo $PATH
/home/arturo/torch/install/bin:/home/arturo/torch/install/bin:/home/arturo/torch/install/bin:/home/arturo/torch/install/bin:/home/arturo/torch/install/bin:/home/arturo/torch/install/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/local/cuda-7.0/bin

推荐答案

评论中建议的解决方案：

Solution as suggested in the comments:

export PATH=/usr/local/cuda-8.0/bin:$PATH

问题是 $ PATH 的顺序，我的上一个命令的 = $ PATH：/ usr / local ... 而不是 = / usr / local ....：$ PATH

The problem was the ordering of $PATH, that my previous command had the =$PATH:/usr/local... instead of =/usr/local....:$PATH

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