CI: add s390x compiler

Author: robUx4

.github/workflows/linux.yaml

@@ -7,6 +7,7 @@ on:
 
 jobs:
   Latest:
+    name: Linux ${{matrix.cxx}}
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -79,3 +80,47 @@ jobs:
 
       - name: Test installation
         run: cmake --install _build --prefix ${GITHUB_WORKSPACE}/_built
+
+  s390X:
+    name: Big Endian Linux
+    runs-on: ubuntu-latest
+    env:
+      CMAKE_OPTIONS: -DDEV_MODE=ON -DBUILD_TESTING=ON -DCMAKE_SYSTEM_PROCESSOR=s390x -DCMAKE_CROSSCOMPILING_EMULATOR="qemu-s390x;-L;/usr/s390x-linux-gnu/" -G Ninja
+      CMAKE_MATROSKA_OPTIONS: -DBUILD_EXAMPLES=OFF
+      CXX: s390x-linux-gnu-g++
+    steps:
+      - name: install toolchain
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends qemu-user crossbuild-essential-s390x qemu-system-s390x
+
+      - name: list compilers
+        run: dpkg --list | grep compiler
+
+      - name: Get pushed code
+        uses: actions/checkout@v4
+
+      - name: Checkout libebml
+        uses: actions/checkout@v4
+        with:
+          repository: Matroska-Org/libebml
+          path: libebml
+          ref: v1.x
+
+      - name: Configure libebml
+        run: cmake -S libebml -B libebml/_build ${{ env.CMAKE_OPTIONS }}
+
+      - name: Build libebml
+        run: cmake --build libebml/_build --parallel
+
+      - name: Install libebml
+        run: cmake --install libebml/_build --prefix ${GITHUB_WORKSPACE}/_built
+
+      - name: Configure
+        run: cmake -S . -B _build  ${{ env.CMAKE_OPTIONS }} ${{ env.CMAKE_MATROSKA_OPTIONS }} -DEBML_DIR="${GITHUB_WORKSPACE}/_built/lib/cmake/EBML"
+
+      - name: Build
+        run: cmake --build _build --parallel
+
+      - name: Test installation
+        run: cmake --install _build --prefix ${GITHUB_WORKSPACE}/_built