BLD Add DISTDIR variable. ### Description

Adds `DISTDIR` env variable that points to the directory where libraries should be copied to when building shared libraries with recipe.

### Checklists

- [x] Add new / update outdated documentation

<div align="center">
  <a href="https://github.com/pyodide/pyodide">
  <img src="./docs/_static/img/pyodide-logo-readme.png" alt="Pyodide">
  </a>
</div>

[![NPM Latest Release](https://img.shields.io/npm/v/pyodide)](https://www.npmjs.com/package/pyodide)
[![PyPI Latest Release](https://img.shields.io/pypi/v/pyodide-build.svg)](https://pypi.org/project/pyodide-build/)
[![Build Status](https://circleci.com/gh/pyodide/pyodide.png)](https://circleci.com/gh/pyodide/pyodide)
[![Documentation Status](https://readthedocs.org/projects/pyodide/badge/?version=stable)](https://pyodide.readthedocs.io/?badge=stable)

Pyodide is a Python distribution for the browser and Node.js based on WebAssembly.

## What is Pyodide?

Pyodide is a port of CPython to WebAssembly/[Emscripten](https://emscripten.org/).

Pyodide makes it possible to install and run Python packages in the browser with
[micropip](https://pyodide.org/en/stable/usage/api/micropip-api.html). Any pure
Python package with a wheel available on PyPi is supported. Many packages with C
extensions have also been ported for use with Pyodide. These include many
general-purpose packages such as regex, PyYAML, lxml and scientific Python
packages including NumPy, pandas, SciPy, Matplotlib, and scikit-learn.

Pyodide comes with a robust Javascript ⟺ Python foreign function interface so
that you can freely mix these two languages in your code with minimal friction.
This includes full support for error handling, async/await, and much more.

When used inside a browser, Python has full access to the Web APIs.

## Try Pyodide (no installation needed)

Try Pyodide in a
[REPL](https://pyodide.org/en/stable/console.html) directly in
your browser. For further information, see the
[documentation](https://pyodide.org/en/stable/).

## Getting Started

Pyodide offers three different ways to get started depending on your needs and
technical resources. These include:

- Use a hosted distribution of Pyodide: see the [Getting
  Started](https://pyodide.org/en/stable/usage/quickstart.html) documentation.
- Download a version of Pyodide from the [releases
  page](https://github.com/pyodide/pyodide/releases/) and serve it
  with a web server.
- [Build Pyodide from source](https://pyodide.org/en/stable/development/building-from-sources.html)
  - Build natively with `make`: primarily for Linux users who want to
    experiment or contribute back to the project.
  - [Use a Docker image](https://pyodide.org/en/stable/development/building-from-sources.html#using-docker):
    recommended for Windows and macOS users and for Linux users who prefer a
    Debian-based Docker image with the dependencies already installed.

## History

Pyodide was created in 2018 by [Michael Droettboom](https://github.com/mdboom)
at Mozilla as part of the [Iodide
project](https://github.com/iodide-project/iodide). Iodide is an experimental
web-based notebook environment for literate scientific computing and
communication.

Iodide is no longer maintained. If you want to use Pyodide in an interactive
client-side notebook, see [Pyodide notebook
environments](https://pyodide.org/en/stable/project/related-projects.html#notebook-environments-ides-repls).

## Contributing

Please view the [contributing
guide](https://pyodide.org/en/stable/development/contributing.html) for tips
on filing issues, making changes, and submitting pull requests. Pyodide is an
independent and community-driven open-source project. The decision-making
process is outlined in the [Project
governance](https://pyodide.org/en/stable/project/governance.html).

## Communication

- Blog: [blog.pyodide.org](https://blog.pyodide.org/)
- Mailing list: [mail.python.org/mailman3/lists/pyodide.python.org/](https://mail.python.org/mailman3/lists/pyodide.python.org/)
- Gitter: [gitter.im/pyodide/community](https://gitter.im/pyodide/community)
- Twitter: [twitter.com/pyodide](https://twitter.com/pyodide)
- Stack Overflow: [stackoverflow.com/questions/tagged/pyodide](https://stackoverflow.com/questions/tagged/pyodide)

## License

Pyodide uses the [Mozilla Public License Version
2.0](https://choosealicense.com/licenses/mpl-2.0/).

<div align="center">
  <a href="https://github.com/pyodide/pyodide">
  <img src="./docs/_static/img/pyodide-logo-readme.png" alt="Pyodide">
  </a>
</div>

[![NPM Latest Release](https://img.shields.io/npm/v/pyodide)](https://www.npmjs.com/package/pyodide)
[![PyPI Latest Release](https://img.shields.io/pypi/v/pyodide-build.svg)](https://pypi.org/project/pyodide-build/)
[![Build Status](https://circleci.com/gh/pyodide/pyodide.png)](https://circleci.com/gh/pyodide/pyodide)
[![Documentation Status](https://readthedocs.org/projects/pyodide/badge/?version=stable)](https://pyodide.readthedocs.io/?badge=stable)

Pyodide is a Python distribution for the browser and Node.js based on WebAssembly.

## What is Pyodide?

Pyodide is a port of CPython to WebAssembly/[Emscripten](https://emscripten.org/).

Pyodide makes it possible to install and run Python packages in the browser with
[micropip](https://pyodide.org/en/stable/usage/api/micropip-api.html). Any pure
Python package with a wheel available on PyPi is supported. Many packages with C
extensions have also been ported for use with Pyodide. These include many
general-purpose packages such as regex, PyYAML, lxml and scientific Python
packages including NumPy, pandas, SciPy, Matplotlib, and scikit-learn.

Pyodide comes with a robust Javascript ⟺ Python foreign function interface so
that you can freely mix these two languages in your code with minimal friction.
This includes full support for error handling, async/await, and much more.

When used inside a browser, Python has full access to the Web APIs.

## Try Pyodide (no installation needed)

Try Pyodide in a
[REPL](https://pyodide.org/en/stable/console.html) directly in
your browser. For further information, see the
[documentation](https://pyodide.org/en/stable/).

## Getting Started

Pyodide offers three different ways to get started depending on your needs and
technical resources. These include:

- Use a hosted distribution of Pyodide: see the [Getting
  Started](https://pyodide.org/en/stable/usage/quickstart.html) documentation.
- Download a version of Pyodide from the [releases
  page](https://github.com/pyodide/pyodide/releases/) and serve it
  with a web server.
- [Build Pyodide from source](https://pyodide.org/en/stable/development/building-from-sources.html)
  - Build natively with `make`: primarily for Linux users who want to
    experiment or contribute back to the project.
  - [Use a Docker image](https://pyodide.org/en/stable/development/building-from-sources.html#using-docker):
    recommended for Windows and macOS users and for Linux users who prefer a
    Debian-based Docker image with the dependencies already installed.

## History

Pyodide was created in 2018 by [Michael Droettboom](https://github.com/mdboom)
at Mozilla as part of the [Iodide
project](https://github.com/iodide-project/iodide). Iodide is an experimental
web-based notebook environment for literate scientific computing and
communication.

Iodide is no longer maintained. If you want to use Pyodide in an interactive
client-side notebook, see [Pyodide notebook
environments](https://pyodide.org/en/stable/project/related-projects.html#notebook-environments-ides-repls).

## Contributing

Please view the [contributing
guide](https://pyodide.org/en/stable/development/contributing.html) for tips
on filing issues, making changes, and submitting pull requests. Pyodide is an
independent and community-driven open-source project. The decision-making
process is outlined in the [Project
governance](https://pyodide.org/en/stable/project/governance.html).

## Communication

- Blog: [blog.pyodide.org](https://blog.pyodide.org/)
- Mailing list: [mail.python.org/mailman3/lists/pyodide.python.org/](https://mail.python.org/mailman3/lists/pyodide.python.org/)
- Gitter: [gitter.im/pyodide/community](https://gitter.im/pyodide/community)
- Twitter: [twitter.com/pyodide](https://twitter.com/pyodide)
- Stack Overflow: [stackoverflow.com/questions/tagged/pyodide](https://stackoverflow.com/questions/tagged/pyodide)

## License

Pyodide uses the [Mozilla Public License Version
2.0](https://choosealicense.com/licenses/mpl-2.0/).
