A Garry's Mod module that provides an interface for external consoles.
The only supported compilation platform for this project on Windows is Visual Studio 2017. However, it's possible it'll work with Visual Studio 2015 and Visual Studio 2019 because of the unified runtime.
On Linux, everything should work fine as is.
For macOS, any Xcode (using the GCC compiler) version MIGHT work as long as the Mac OSX 10.7 SDK is used.
These restrictions are not random; they exist because of ABI compatibility reasons.
If stuff starts erroring or fails to work, be sure to check the correct line endings (\n and such) are present in the files for each OS.
This project requires garrysmod_common, a framework to facilitate the creation of compilations files (Visual Studio, make, XCode, etc). Simply set the environment variable GARRYSMOD_COMMON or the premake option --gmcommon=path to the path of your local copy of garrysmod_common.
We also use SourceSDK2013. The links to SourceSDK2013 point to my own fork of VALVe's repo and for good reason: Garry's Mod has lots of backwards incompatible changes to interfaces and it's much smaller, being perfect for automated build systems like Azure Pipelines.