Installing Halide

For now, we recommend building Halide from source for the full functionality. Clone the repository to your local directory first:

git clone https://github.com/halide/Halide

Then follow the building instructions from the official readme.

This tutorial also uses the Python bindings. To build the Python bindings, first build main Halide code. Then go to the python_bindings directory, and install the following requirements:

$ pip install numpy scipy pillow imageio pybind11

Next run

$ make

After building the Python bindings, we need to point Python to it so that we can import halide. Add /path/to/halide/python_bindings/bin to your PYTHONPATH environment variable (e.g. export PYTHONPATH=/path/to/halide/python_bindings/bin:$PYTHONPATH).

There is one more step. You need to install the autoscheduler. There are several autoschedulers in Halide but we will use the gradient_autoscheduler as it is currently the only autoscheduler that supports GPU scheduling. From the root directory of Halide:

$ cd apps/gradient_autoscheduler
$ make

And again add /path/to/halide/apps/gradient_autoscheduler/bin to PYTHONPATH.

After this, go to the Python console and try

import halide
import libgradient_autoscheduler

If the imports are successful, you are ready!