Test multiple targets in CI

.github/workflows/ci.yml

@@ -1,26 +1,55 @@
 name: CI
 
-on:
-  push:
-    branches: [ "trunk" ]
-  pull_request:
-    branches: [ "trunk" ]
+on: [push, pull_request]
 
 env:
   CARGO_TERM_COLOR: always
 
 jobs:
   test:
+    strategy:
+      matrix:
+        target:
+          - x86_64-unknown-linux-gnu
+          - aarch64-unknown-linux-gnu
+          - riscv64gc-unknown-linux-gnu
+        build_std: [false]
+        include:
+          - target: riscv32gc-unknown-linux-gnu
+            build_std: true
     runs-on: ubuntu-latest
 
     steps:
     - uses: actions/checkout@v3
     - name: Install Rust
-      run: rustup update nightly && rustup default nightly
-    - name: Run Example Binary
+      run: |
+        rustup update nightly
+        rustup default nightly
+    - name: Install Rust standard library source
+      if: matrix.build_std
+      run: rustup component add rust-src
+    - name: Install cross-compilation tools
+      uses: taiki-e/setup-cross-toolchain-action@v1
+      with:
+        target: ${{ matrix.target }}
+
+    - name: Build example binary
+      if: '!matrix.build_std'
+      run: cargo build --release
+    - name: Build example binary
+      if: matrix.build_std
+      run: cargo build --release -Zbuild-std
+
+    - name: Run example binary
+      if: '!matrix.build_std'
       run: (cargo run --release 2>&1 | tee ../run.log) || true
       working-directory: example
-    - name: Check Log
+    - name: Run example binary
+      if: matrix.build_std
+      run: (cargo run --release -Zbuild-std 2>&1 | tee ../run.log) || true
+      working-directory: example
+
+    - name: Check log
       run: |
         grep "panicked at 'panic', example/src/main.rs:36:5" run.log
         grep 'note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace' run.log