# [OpenWRT](https://openwrt.org/)

## Environment Setup
### Ubuntu
### macOS
### WSL2

## Build
- [[OpenWrt Wiki] Build system usage](https://openwrt.org/docs/guide-developer/toolchain/use-buildsystem)

### Default config for Bananapi BPi-R64
- `make defconfig`
- `make menuconfig`
- Target System -> MediaTek Ralink ARM
- Subtarget -> MT7622
- Target Profile -> Bananapi BPi-R64
- Save -> Ok -> Exit
- `make -j $(nproc) kernel_menuconfig`
- Save -> Ok -> Exit
- `make -j $(nproc) download`
- `make -j $(($(nproc)+1)) V=s`
- Image Location
- `<openwrt>/bin/targets/mediatek/mt7622/openwrt-mediatek-mt7622-bananapi_bpi-r64-sdcard.img.gz`

### Build the OpenWrt Image Builder
- `make menuconfig`
- `[*] Build the OpenWrt Image Builder`
- `[ ] Include package repositories`
- Save -> Ok -> Exit
- `make -j $(($(nproc)+1)) V=s`
- Image Builder Location
- `<openwrt>/bin/targets/mediatek/mt7622/openwrt-imagebuilder-mediatek-mt7622.Linux-x86_64.tar.xz`

### Issue
#### Build failed with externel toolchain
- https://blog.csdn.net/weixin_38387929/article/details/117020343
- https://insidelinuxdev.net/article/a098rr.html
- https://patchwork.ozlabs.org/project/openwrt/patch/[e-mail]/
- https://github.com/openwrt/openwrt/commit/2555ffb4536e2727465e9a0d426ad3c4f1ef003a
- https://stackoverflow.com/questions/48777554/what-is-the-difference-between-ar-nm-and-gcc-ar-gcc-nm

## BPI-R3

- https://wiki.banana-pi.org/Banana_Pi_BPI-R3
- https://github.com/BPI-SINOVOIP/BPI-R3-OPENWRT-V21.02.3
- https://forum.banana-pi.org/t/banana-pi-bpi-r3-openwrt-image/13236/4
- https://github.com/openwrt/openwrt/commit/a96382c1bb204698cd43e82193877c10e4b63027#diff-f54843b2d13758fa12550a0a284276695bc0b66919fc7a192c025f2db196b70f
- https://forum.banana-pi.org/t/bpi-r3-hw-issues/14027
- https://github.com/openwrt/mt76
- Disable `CONFIG_GDB`
- https://git01.mediatek.com/plugins/gitiles/?format=HTML

## Reference

- https://www.cnblogs.com/xiaomingjun/p/16112836.html