beignet-dev software package provides OpenCL for Intel GPUs (development files and documentation), you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install beignet-dev
beignet-dev is installed in your system.
Make ensure the beignet-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep beignet-dev *
You will get with beignet-dev package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Library development |
| Package | beignet-dev |
| Version | 1.2.0-3 |
| Description | OpenCL for Intel GPUs (development files and documentation) |
| Sub Section | libdevel |