Building flutter apps

1. How to build your flutter app

Self-building

Use --target-backend-type option to select display backends. Default is Wayland.

Target backend	Build mode	Command
wayland	release	flutter-elinux build elinux
x11	release	flutter-elinux build elinux --target-backend-type=x11
gbm	release	flutter-elinux build elinux --target-backend-type=gbm
eglstream	release	flutter-elinux build elinux --target-backend-type=eglstream
wayland	debug	flutter-elinux build elinux --debug
x11	debug	flutter-elinux build elinux --debug --target-backend-type=x11
gbm	debug	flutter-elinux build elinux --debug --target-backend-type=gbm
eglstream	debug	flutter-elinux build elinux --debug --target-backend-type=eglstream

Cross-building from x64 to arm64

Cross-building requires knowledge (Not easy, you might get build errors). You need to prepare your sysroot which is for cross-building for your target device by using --target-sysroot. Also, Use --target-arch option to specify arm64 targets. Default is current host CPU architecture.

$ flutter-elinux build elinux --target-arch=arm64 --target-sysroot=<path_to_target's_sysroot>

There are some ways to create a sysroot like Yocto, buildroot, and so on. Here, we show an example using a sysroot for arm64v8/ubuntu:18.04 docker image, but using sysroot and toolchain for your target device is better.

Create sysroot for arm64

First, install Docker by following Install Docker Engine on Ubuntu.

S sudo apt install qemu-user-static

$ sudo docker run -it arm64v8/ubuntu:18:04
In docker:
# apt install clang cmake build-essential pkg-config libegl1-mesa-dev libxkbcommon-dev libgles2-mesa-dev
# apt install libwayland-dev wayland-protocols
# exit

$ sudo docker ps -a

$ sudo docker cp 

2. Build artifacts

The artifacts will be put in build/${target-arch}/${build-mode}/bundle.