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Sometimes, it becomes necessary to switch to an earlier version of CUDA in order to run older code on a machine that is
actually set up to use the current version of the CUDA toolkit.
This is as simple as adjusting the values of a few environment variables, yet it is cumbersome to do manually.
Therefore, this repository provides the bash script switch-cuda.sh, which adjusts the environment to
use a specific version of CUDA for the current bash session.
Notice: switch-cuda.sh has been written for and tested on Ubuntu 16.04, but is easily adapted
for other platforms.
source switch-cuda.sh [VERSION]
Notice that the script has to be sourced rather than executed, as it performs changes of environment variables that are
supposed to persist after the script has finished.
If a version number is provided, than all relevant environment variables are adjusted to the required CUDA version
(including PATH, LD_LIBRARY_PATH, CUDA_HOME, and CUDA_ROOT).
If no version is provided, however, then the script simply prints all versions of CUDA that have been found on the used
machine (in /usr/local).
$ source switch-cuda.sh
The following CUDA installations have been found (in '/usr/local'):
* cuda-8.0
* cuda-9.0
* cuda-9.1
$ source switch-cuda.sh 9.0
Switched to CUDA 9.0.
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