WIP v7 compilers without egor-tensin

Author: robUx4

.github/workflows/linux.yaml

@@ -44,54 +44,19 @@ jobs:
       - name: Test installation
         run: cmake --install _build --prefix ${GITHUB_WORKSPACE}/_built
 
-  GCC-7:
-    runs-on: ubuntu-20.04
-    env:
-      CMAKE_OPTIONS: -DDEV_MODE=ON -DBUILD_TESTING=ON
-      CMAKE_MATROSKA_OPTIONS: -DBUILD_EXAMPLES=ON
-    steps:
-      - uses: egor-tensin/setup-gcc@v1
-        with:
-          version: 7
-
-      - name: Get pushed code
-        uses: actions/checkout@v4
-
-      - name: Checkout libebml
-        uses: actions/checkout@v4
-        with:
-          repository: Matroska-Org/libebml
-          path: libebml
-          # minimum version we support ref: 'release-1.4.3'
-
-      - 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
-
-  Clang-7:
+  Oldest:
     runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        compiler: [
+          { "cpp": "g++",     "version": "7", "cmake": ""},
+          { "cpp": "clang++", "version": "7", "cmake": "-DCMAKE_CXX_FLAGS=-stdlib=libc++"},
+        ]
     env:
-      CMAKE_OPTIONS: -DDEV_MODE=ON -DBUILD_TESTING=ON
+      CMAKE_OPTIONS: -DDEV_MODE=ON -DBUILD_TESTING=ON ${{ matrix.compiler.cmake }}
       CMAKE_MATROSKA_OPTIONS: -DBUILD_EXAMPLES=ON
+      CXX: ${{ matrix.compiler.cpp }}-${{ matrix.compiler.version }}
     steps:
-      - uses: egor-tensin/setup-clang@v1
-        with:
-          version: 7
-
       - name: Get pushed code
         uses: actions/checkout@v4