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Building TrustNote Rust SDK From Source for Raspberry Pi

Note: The following procedures were tested to work for both raspberry pi 2b and 2b+.

Build for the host (Ubuntu)

Install Rust

curl https://sh.rustup.rs -sSf | sh

Config your current shell

source $HOME/.cargo/env

Clone TrustNote Rust SDK

git clone https://github.com/trustnote/rust-trustnote.git

Build the project

cargo build

Note: You may need to run sudo apt install libssl-dev if you see error messages like this:

error: failed to run custom build command for `openssl-sys v0.9.35`

Cross Compile

Install the environment

sudo apt-get install make git-core ncurses-dev gcc-arm*

Configure cargo for cross compilation

cd ttt
nano .cargo/config

Edit the contents:

[target.arm-unknown-linux-gnueabi]
linker = "arm-linux-gnueabi-gcc"
ar = "arm-linux-gnueabi-gcc"

Install the cross compiled standard crates

rustup target add armv7-unknown-linux-gnueabihf

Build the project for the target

cargo build --target arm-unknown-linux-gnueabi

If successful, you will find the executable ttt from target/arm-unknown-linux-gnueabi/debug/ where you can deploy the binary to the target.