Use matrix for builds

.github/workflows/build.yml

@@ -3,30 +3,46 @@ name: Build
 on:
   pull_request:
   push:
-    paths: 
-      - '.github/workflows/build.yml'
-      - '**/Cargo.toml'
-      - '**/Cargo.lock'
-      - '**/src/*'
+    paths:
+      - ".github/workflows/build.yml"
+      - "**/Cargo.toml"
+      - "**/Cargo.lock"
+      - "**/src/*"
 
 jobs:
   build_and_test:
-    name: Run Tests 
+    name: Run Tests
+
+    # Use a build matrix to run this job targeting all supported platforms
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        # All supported targets
+        target:
+          - x86_64-unknown-linux-musl
+          - aarch64-unknown-linux-musl
+        # All supported Rust channels
+        rust_channel:
+          - stable
+
+    # Common build steps
     steps:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
+          toolchain: ${{ matrix.rust_channel }}
+          override: true
 
       - name: Compile
         uses: actions-rs/cargo@v1
         with:
+          use-cross: true
           command: build
-          args: --release
+          args: --release --target ${{ matrix.target }}
 
       - name: Run Tests
         uses: actions-rs/cargo@v1
         with:
+          use-cross: true
           command: test
-          args: --all --release
+          args: --all --release --target ${{ matrix.target }}

src/protomask-6over4.rs

@@ -1,5 +1,5 @@
-
+//! This is a placeholder for a future 6over4 implementation
 #[tokio::main]
-pub async fn main(){
-    
-}
+pub async fn main() {
+    println!("You did it! You found the incomplete binary :)");
+}