Update docs on building on Linux

Readme.md

@@ -291,10 +291,7 @@ Full build instructions can be found [here](docs/building_for_windows.md).
 <a name="building_on_linux"></a>
 ## Building on Linux
 
-If you want to run Advanced Settings on linux you can build it yourself using `qmake` and `make` or using Qt Creator, you'll have to copy the `res` folder from the `src` folder into folder that contains the binary
-and copy `third-party/openvr/lib/linux64/libopenvr_api.so` into your systems library path.
-
-If you want to contribute changes running `clang-format` is necessary. More details are in the [CONTRIBUTING.md](docs/CONTRIBUTING.md) file.
+Full build instructions can be found [here](docs/building_for_linux.md).
 
 <a name="notes"></a>
 # Notes:

docs/building_for_linux.md

@@ -0,0 +1,43 @@
+# Building for Linux
+
+- [Requirements](#requirements)
+- [Locations and Environment Variables](#locations-and-environment-variables)
+- [Building](#building)
+- [Contributing](#contributing)
+
+## Requirements
+
+The following packages are necessary for compiling: 
+
+`sudo apt install build-essential qtbase5-dev qttools5-dev qtdeclarative5-dev qtmultimedia5-dev qt5-default qttools5-dev-tools`
+
+If you install Qt 5.12 you should have the above packages.
+
+Along with either `clang` or `g++`. At least `g++-7` is required, due to C++17 support.
+
+For linting with `clang-tidy` the following are necessary:
+
+`sudo apt install bear clang-tidy`
+
+All applications are required to be in the `PATH`.
+
+## Locations and Environment Variables
+
+The following environmental variables are relevant for building the project.
+
+| Environment Variable  | Purpose |
+| --------------------  | ------------- |
+| `QMAKE_SPEC`              | The [mkspec](https://forum.qt.io/topic/70970/what-is-mkspecs-used-for-how-to-configure-for-my-hardware) to compile to. Either `linux-g++` or `linux-clang`. Defaults to `linux-g++`.   |
+| `USE_TIDY`              | If set a compilation database will be created and the project linted. Can only be used with `clang`.  |
+
+If an environment variable isn't set a default value will be provided. The default values are shown in the table below.
+
+## Building
+
+With the programs above installed and environment variables set, go into the root folder of the repository and run `./build_scripts/linux/build_linux.sh`.
+
+You'll have to copy the `res` directory into the resulting binary location, and add `third-party/openvr/lib/linux64/libopenvr_api.so` to your systems library path.
+
+## Contributing
+
+For full details, see [CONTRIBUTING.md](CONTRIBUTING.md).