Luma3DS
Noob-proof (N)3DS "Custom Firmware"
What it is
Luma3DS is a program to patch the system software of (New) Nintendo 3DS handheld consoles "on the fly", adding features (such as per-game language settings and debugging capabilities for developers) and removing restrictions enforced by Nintendo (such as the region lock).
It also allows you to run unauthorized ("homebrew") content by removing signature checks.
To use it, you will need a console capable of running homebrew software on the ARM9 processor. We recommend Plailect's guide for details on how to get your system ready.
Since Luma3DS v8.0, Luma3DS has its own in-game menu, triggerable by L+Down+Select (see the release notes).
Compiling
First you need to clone the repository with: git clone https://github.com/AuroraWright/Luma3DS.git
To compile, you'll need a recent commit of makerom added to your PATH. You'll also need to install firmtool, its README contains installation instructions.
You'll also need to update your libctru and devkitARM installation to their latest releases.
Then, run make.
The produced file is called boot.firm and is meant to be copied to the root of your SD card, for usage with boot9strap.
Setup / Usage / Features
See https://github.com/AuroraWright/Luma3DS/wiki
Credits
See https://github.com/AuroraWright/Luma3DS/wiki/Credits
Licensing
This software is licensed under the terms of the GPLv3.
You can find a copy of the license in the LICENSE.txt file.
Files in the GDB stub are instead double-licensed as MIT or "GPLv2 or any later version", in which case it is specified in the file header.