# Install Docker in rootless mode
sudo apt install uidmap
sudo apt-get install -y dbus-user-session
sudo apt-get install -y fuse-overlayfs
sudo apt-get install -y slirp4netns
sudo apt-get install -y iptables
curl -fsSL https://get.docker.com/rootless | sh  #### To remove run dockerd-rootless-setuptool.sh uninstall
systemctl --user start docker

# Create docker image for armhf cross compile
nano Dockerfile_armhf_CC
########
FROM debian:bullseye

RUN dpkg --add-architecture armhf && \ 
    apt-get update && \
    apt-get install -y curl git sudo nano && \
    apt-get install -y build-essential && \
    apt-get install -y libc6-armhf-cross libc6-dev-armhf-cross gcc-arm-linux-gnueabihf && \
    apt-get install -y libdbus-1-dev libdbus-1-dev:armhf  && \
    apt-get install -y libasound2-dev:armhf openssl:armhf libssl-dev:armhf && \
    apt-get clean
########
docker build -t dev_armhf_cc:bullseye - < Dockerfile_armhf_CC
## or docker build -t dev_aarch64_cc:bullseye - < Dockerfile_aarch64_CC ### for aarch64 (amlogic_tvbox)

# Run docker container for armhf cross compile
docker run -it -v /home/mgt/Data/CamillaDSP:/home/CamillaDSP dev_armhf_cc:bullseye ### it for interactive console and v to mount local dir to container dir
## docker run -it -v /home/mgt/Dev/CamillaDSP:/home/CamillaDSP dev_aarch64_cc:bullseye ### for aarch64 (amlogic_tvbox); it for interactive console and v to mount local dir to container dir

# Install rustc/cargo (toolchain) and build inside container, NOT NEEDED for aarch64, move straight to build command instead
mkdir /home/mgt
adduser mgt
usermod -aG sudo mgt
chown mgt:mgt -R /home/mgt
chown mgt:mgt -R /home/CamillaDSP
cd /home/mgt
su mgt
export CARGO_HOME=/home/mgt/.cargo
export PATH=/home/mgt/.cargo/bin:$PATH
export USER=mgt
mkdir /home/mgt/.cargo
cat > /home/mgt/.cargo/config << EOF
[target.armv7-unknown-linux-gnueabihf]
linker = "arm-linux-gnueabihf-gcc"
EOF
sudo dpkg --add-architecture armhf
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
source "$HOME/.cargo/env"
rustup default stable
rustup target add x86_64-unknown-linux-gnu
rustup target add armv7-unknown-linux-gnueabihf
export PKG_CONFIG_PATH="/usr/lib/arm-linux-gnueabihf/pkgconfig"
export PKG_CONFIG_ALLOW_CROSS="true"

# Build CamillaDSP
cd /home/CamillaDSP
cd <pre-downloaded folder or git clone https://github.com/HEnquist/camilladsp.git && cd camilladsp>
git tag
git checkout ... (version to build)
RUSTFLAGS='-C target-feature=+neon' cargo build --target armv7-unknown-linux-gnueabihf --features secure-websocket --features 32bit --release
## RUSTFLAGS='-C target-feature=+neon' cargo build --target aarch64-unknown-linux-gnu --features secure-websocket --release ### for aarch64 (amlogic_tvbox)
## RUSTFLAGS='-C target-feature=+neon -C strip=debuginfo -C codegen-units=1 -C lto=true -C embed-bitcode=yes' cargo build --target aarch64-unknown-linux-gnu --features secure-websocket --release ### for optimized aarch64 (amlogic_tvbox)



### Might need to edit Docker file to change base from bullseye to bookworm in case newer version of libs/tools are needed


### Other refs
https://doc.rust-lang.org/cargo/reference/profiles.html
https://nnethercote.github.io/perf-book/build-configuration.html
https://earthly.dev/blog/cross-compiling-raspberry-pi/
https://jensd.be/1126/linux/cross-compiling-for-arm-or-aarch64-on-debian-or-ubuntu