big endian tests on CI

Author: aldanor

.github/workflows/ci.yml

@@ -13,25 +13,68 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust: [stable, beta, nightly, 1.62.0]  # MSRV=1.62
+        rust: [stable, beta, nightly, 1.62.0] # MSRV=1.62
     steps:
       - uses: actions/checkout@v2
-        with: {submodules: true}
+        with: { submodules: true }
       - uses: actions-rs/toolchain@v1
-        with: {profile: minimal, toolchain: '${{ matrix.rust }}', override: true}
+        with:
+          { profile: minimal, toolchain: "${{ matrix.rust }}", override: true }
       - run: cargo test
+  tests-s390x:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        features: [default, reference]
+    steps:
+      - uses: actions/checkout@v2
+        with: { submodules: true }
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: nightly
+          override: true
+          target: s390x-unknown-linux-gnu
+          components: rust-src
+      - run: sudo apt-get update && sudo apt-get install -y qemu-user-static gcc-s390x-linux-gnu
+      - run: |
+          if [ "${{ matrix.features }}" = "reference" ]; then
+            echo "FEATURES=alloc,reference" >> $GITHUB_ENV
+          else
+            echo "FEATURES=alloc" >> $GITHUB_ENV
+          fi
+      - run: |
+          cargo build \
+            --target s390x-unknown-linux-gnu \
+            --tests \
+            -Zbuild-std \
+            --no-default-features \
+            --features=${FEATURES}
+        env:
+          CARGO_TARGET_S390X_UNKNOWN_LINUX_GNU_LINKER: "s390x-linux-gnu-gcc"
+          RUSTFLAGS: "-D warnings -C target-feature=+crt-static"
+      # - run: qemu-s390x-static ./target/s390x-unknown-linux-gnu/debug/deps/*test*
+      - run: |
+          for test in ./target/s390x-unknown-linux-gnu/debug/deps/*test*; do
+            echo "Running $test"
+            qemu-s390x-static -strace $test || echo "Failed: $test"
+          done
   reference:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-        with: {submodules: true}
+        with: { submodules: true }
       - uses: actions-rs/toolchain@v1
-        with: {profile: minimal, toolchain: stable, override: true}
+        with: { profile: minimal, toolchain: stable, override: true }
       - run: cargo test --features=reference
   clippy:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
-        with: {profile: minimal, toolchain: beta, override: true, components: clippy}
+        with:
+          profile: minimal
+          toolchain: beta
+          override: true
+          components: clippy
       - run: cargo clippy