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.. _Environment_Variables:
Environment Variables
======================
SasView creates and uses a number of environment variables:
- **SAS_MODELPATH=path**
- sets the directory containing custom models
- **SAS_DLL_PATH=path**
- sets the path to the compiled modules
- **SAS_WEIGHTS_PATH=~/.sasview/weights**
- sets the path to custom distribution files (see :ref:`polydispersityhelp`)
- **XDG_CACHE_HOME=~/.cache/**
- sets the pyopencl cache root (on Linux)
- **XDG_CONFIG_HOME=~/.config**
- sets configuration file location (on Linux)
- used via the `platformdirs <https://github.com/tox-dev/platformdirs?tab=readme-ov-file#example-output>` package
- **SAS_COMPILER=tinycc|msvc|mingw|unix**
- sets the DLL compiler
- **SAS_OPENCL=vendor:device|none**
- sets the target OpenCL device for GPU computations
- use *none* to disable
- **SAS_OPENMP=1|0**
- turns on/off OpenMP multi-processing of the DLLs
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*Document History*
| 2018-07-20 Steve King
|
