Ready to use Github workflow for cross-compiling a rust binary to many Linux architectures.

CI.yml

# Instruction + template repo: https://github.com/FedericoPonzi/rust-ci
# Search and replace <YOUR_BINARY_NAME> with your binary name.
name: CI

on:
  pull_request:
  push:
    branches:
      - master
    tags:
      - 'v*.*.*'

jobs:
  style:
    name: Check Style
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v1

      - name: Install rust
        uses: actions-rs/toolchain@v1
        with:
          toolchain: stable
          components: rustfmt
          profile: minimal
          override: true

      - name: cargo fmt -- --check
        uses: actions-rs/cargo@v1
        with:
          command: fmt
          args: --all -- --check


  test:
    name: Test
    needs: [style]
    runs-on: ubuntu-latest

    strategy:
      matrix:
        build: [stable, beta, nightly]
        include:
          - build: beta
            rust: beta
          - build: nightly
            rust: nightly
            benches: true

    steps:
      - name: Checkout
        uses: actions/checkout@v1

      - name: Install rust
        uses: actions-rs/toolchain@v1
        with:
          toolchain: ${{ matrix.rust || 'stable' }}
          profile: minimal
          override: true

      - name: Build debug
        uses: actions-rs/cargo@v1
        with:
          command: build
          args: ${{ matrix.features }}

      - name: Test
        uses: actions-rs/cargo@v1
        with:
          command: test
          args: ${{ matrix.features }}

      - name: Test all benches
        if: matrix.benches
        uses: actions-rs/cargo@v1
        with:
          command: test
          args: --benches ${{ matrix.features }}
  deploy:
    name: deploy
    needs: [test]
    if: startsWith(github.ref, 'refs/tags/')
    runs-on: ubuntu-latest
    strategy: 
      matrix:
        target: [ aarch64-unknown-linux-gnu, armv7-unknown-linux-gnueabihf, i686-unknown-linux-gnu, i686-unknown-linux-musl, mips-unknown-linux-gnu, mips64-unknown-linux-gnuabi64, mips64el-unknown-linux-gnuabi64, mipsel-unknown-linux-gnu, powerpc-unknown-linux-gnu, powerpc64-unknown-linux-gnu, powerpc64le-unknown-linux-gnu,           arm-unknown-linux-gnueabi          ,x86_64-unknown-linux-gnu           ,x86_64-unknown-linux-musl]
    steps:
      - name: Checkout
        uses: actions/checkout@v1
      - name: Install rust
        uses: actions-rs/toolchain@v1
        with:
          toolchain: stable
          profile: minimal
          override: true
          target: ${{ matrix.target }}

      - name: Build target
        uses: actions-rs/cargo@v1
        with:
          use-cross: true
          command: build
          args: --release --target ${{ matrix.target }}

      - name: Package
        shell: bash
        run: |
          cd target/${{ matrix.target }}/release          
          tar czvf ../../../<YOUR_BINARY_NAME>-${{ matrix.target }}.tar.gz <YOUR_BINARY_NAME>
          cd -
      - name: Publish
        uses: softprops/action-gh-release@v1
        # TODO: if any of the build step fails, the release should be deleted.
        with:
            files: '<YOUR_BINARY_NAME>*'
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        

I think this could use an update due to actions-rs/toolchain and actions-rs/cargo being unmaintained. I'm using: https://github.com/dtolnay/rust-toolchain