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# trimui toolchain Docker image
## Installation
With Docker installed and running, `make shell` builds the toolchain and drops into a shell inside the container. The container's `~/workspace` is bound to `./workspace` by default. The toolchain is located at `/opt/trimui-toolchain` inside the container, libraries are in `/opt/trimui-toolchain/arm-buildroot-linux-gnueabi/sysroot/usr/lib/`.
After building the first time, unless a dependency of the image has changed, `make shell` will skip building and drop into the shell.
## Workflow
- On your host machine, clone repositories into `./workspace` and make changes as usual.
- In the container shell, find the repository in `~/workspace` and build as usual.
- Optionally, `source ~/env-setup.sh` in the shell to set common cross-compiling and path variables.
### Installing extra packages
To install extra packages into your container, add the ubuntu package names to `./extra_packages.txt`, one per line. They will be installed the next time you start a new shell. To keep git from tracking your changes to this file, run `git update-index --skip-worktree ./extra_packages.txt`.
### Adding libraries to the toolchain sysroot
Put files that you want included in the sysroot (libs and headers, you've built, etc.) in `./extras`. They will be copied to `$SYSROOT/usr` as the container is built.
### Changing the buildroot configuration
In `~/buildroot`:
- `make menuconfig`, change options
- `make savedefconfig BR2_DEFCONFIG=../workspace/defconfig`
Then, on the host, copy `./workspace/defconfig` to `./trimui_config/configs/trimui_defconfig`.
## Docker for Mac
Docker for Mac has a memory limit that can make the toolchain build fail. Follow [these instructions](https://docs.docker.com/docker-for-mac/) to increase the memory limit.
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