This buildroot can be used to build RG350 cross-compilation toolchain and the OS image.

First, clone or download the repo and run:

make rg350_defconfig BR2_EXTERNAL=board/opendingux

You only need to run this once.

Now, export BR2_JLEVEL=0 to compile in parallel.

Then, to build the toolchain, run:

make toolchain

You can also build particular libraries and packages this way, for example to build SDL and SDL_Image:

make sdl sdl_image

Optional: If you want to include a set of default applications, emulators, and games from various sources, run this command (you only need to do this once):

board/opendingux/gcw0/download_local_pack.sh

To build the OS image, run:

board/opendingux/gcw0/make_initial_image.sh

The image will saved to:

output/images/od-imager/images/sd_image.bin

This image can be flashed directly to the system SD card, e.g. using balenaEtcher.

To build an updater OPK that can be run directly from the device, run:

board/opendingux/gcw0/make_upgrade.sh