buildbrain

This repository includes:

linux-brain, u-boot-brain and boot4u as submodules
Useful build targets in Makefile
r3build.toml to watch changes that occur in submodules

Confirmed environments

Debian 10 (buster) amd64

Getting Started

Install dependencies.

$ sudo apt install build-essential bison flex libncurses5-dev gcc-arm-linux-gnueabihf libssl-dev bc lzop
$ pip install pyelftools

Clone this repository with recursive clone enabled.
```
$ git clone --recursive git@github.com:brain-hackers/buildbrain.git
```
- If you've cloned it without --recursive, run following command:
```
$ git submodule update --init --recursive
```

Build U-Boot

Run make udefconfig to generate .config.
Run make ubuild to build whole repository and generate u-boot.bin.

Build and deploy boot4u

Run make boot4u
Create index.din and copy AppMain.bin
- mkdir /path/to/your/sd/1st/partition/App/boot4u
- touch /path/to/your/sd/1st/partition/App/boot4u/index.din
- cp boot4u/AppMain.bin /path/to/your/sd/1st/partition/App/boot4u/

Build Linux

Run make ldefconfig to generate .config.
Run make lbuild to generate zImage.
Confirm that linux-brain/arch/arm/boot/zImage exists.

Bootstrap Debian 10 (buster)

Partition an SD card into two partitions.
- 1st: FAT32 (vfat), about 100MB
- 2st: ext4, fill the remaining area
Build and copy the Linux kernel.
- Run make ldefconfig lbuild.
- Copy /linux-brain/arch/arm/boot/zImage and /linux-brain/arch/arm/boot/dts/imx7ulp-pwh1.dtb into the 1st partition.
Run APT cache in background (mandatory): make aptcache.
Run make debian.
Copy all contents in ./brainux into the 2nd partition.
- sudo cp -ar ./brainux/* /path/to/your/sd/2nd/partition/
- Please make sure that all attributes are preserved with -a flag.

Known issues

If you using gcc 10 for host compiler, make ubuild may fail.
To complete build, open u-boot-brain/scripts/dtc/dtc-lexer.lex.c or u-boot-brain/scripts/dtc/dtc-parser.tab.c then comment out YYLTYPE yylloc;

Watch changes in submodules & auto-build

Run make setup-dev to prepare a Python venv to watch code changes. Namely;
- Python 3 venv in env
- r3build command in the env
Run r3build. It'll detect the changes you make and builds the corresponding executable automatically.

What's r3build?

r3build is a smart file watcher that aims to provide hot-reloading feature like Web frontend development.

2.8 KiB Raw Blame History