mozilla-central/third_party/libwebrtc/docs/native-code/development/prerequisite-sw/README.md

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# WebRTC development - Prerequisite software
## Depot Tools
1. [Install the Chromium depot tools][depot-tools].
2. On Windows, depot tools will download a special version of Git during your
first `gclient sync`. On Mac and Linux, you'll need to install [Git][git] by
yourself.
## Linux (Ubuntu/Debian)
A script is provided for Ubuntu, which is unfortunately only available after
your first gclient sync:
```
$ ./build/install-build-deps.sh
```
Most of the libraries installed with this script are not needed since we now
build using Debian sysroot images in build/linux, but there are still some tools
needed for the build that are installed with
[install-build-deps.sh][install-build-deps].
You may also want to have a look at the [Chromium Linux Build
instructions][chromium-linux-build-instructions] if you experience any other problems building.
## Windows
Follow the [Chromium's build instructions for Windows][chromium-win-build-instructions].
WebRTC requires Visual Studio 2017 to be used. If you only have version 2015
available, you might be able to keep using it for some time by setting
`GYP_MSVS_VERSION=2015` in your environment. Keep in mind that this is not a
suppported configuration however.
## macOS
Xcode 12 or higher is required. Latest Xcode is recommended to be able to build
all code. You may use `xcode-select --install` to install it.
Absence of Xcode will cause errors like:
```
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
```
## Android
You'll need a Linux development machine. WebRTC is using the same Android
toolchain as Chrome (downloaded into `third_party/android_tools`) so you won't
need to install the NDK/SDK separately.
1. Install Java OpenJDK as described in the
[Chromium Android prerequisites][chromium-android-build-build-instructions]
2. All set! If you don't run Ubuntu, you may want to have a look at
[Chromium's Linux prerequisites][chromium-linux-prerequisites] for distro-specific details.