buildbrain/README.md

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buildbrain
==========
This repository includes:
- linux-brain and u-boot-brain as submodules
- Useful build targets in Makefile
- r3build.toml to watch changes that occur in submodules
Getting Started
---------------
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1. Install dependencies.
```
$ sudo apt install build-essential libncurses5-dev gcc-arm-linux-gnueabi
```
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1. Clone this repository with recursive clone enabled.
```
$ git clone --recursive git@github.com:puhitaku/buildbrain.git
```
- If you've cloned it without `--recursive`, run following command:
```
$ git submodule update --init --recursive
```
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1. Then run `make setup` to prepare an build environment. Namely;
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- Python 3 venv in `env`
- r3build command in the env
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1. Install uuu.
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- Follow [the instruction](https://github.com/NXPmicro/mfgtools#linux) and build `uuu` executable.
- Put `uuu` where the PATH executable points to.
Build and inject U-Boot
-----------------------
1. Run `make udefconfig` to generate `.config`.
2. Run `make ubuild` to build whole repository and generate `u-boot.sb`.
- i.MX283 loads a packed U-Boot executable called `u-boot.sb`.
3. To inject the executable into i.MX283 in recovery mode, run `make uuu`.
Build Linux
-----------
1. Run `make ldefconfig` to generate `.config`.
1. Run `make lbuild` to generate `zImage`.
1. Confirm that `linux-brain/arch/arm/boot/zImage` exists.
Watch changes in submodules & auto-build
----------------------------------------
1. Run `r3build`. It'll detect the changes you make and builds the corresponding executable automatically.
What's r3build?
---------------
[r3build](https://github.com/puhitaku/r3build) is a smart file watcher that aims to provide hot-reloading feature like Web frontend development.