GH actions: More macOS fixes

.github/workflows/cmake-multi-platform.yml

@@ -59,6 +59,7 @@ jobs:
         with:
           repository: 'microsoft/vcpkg'
           path: 'vcpkg'
+          fetch-depth: '0'
 
       - name: Set reusable strings
         # Turn repeated input strings (such as the build output directory) into step outputs. These step outputs can be used throughout the workflow file.
@@ -87,6 +88,8 @@ jobs:
           cmake -B ${{ steps.strings.outputs.build-output-dir }}
           -G 'Ninja'
           -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
+          -DCMAKE_C_COMPILER=clang
+          -DCMAKE_CXX_COMPILER=clang++
           -DCMAKE_MAKE_PROGRAM=ninja
           -DCMAKE_TOOLCHAIN_FILE="${{ github.workspace }}/vcpkg/scripts/buildsystems/vcpkg.cmake"
           -S ${{ github.workspace }}
@@ -97,7 +100,7 @@ jobs:
         # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
         run: >
           cmake -B ${{ steps.strings.outputs.build-output-dir }}
-          -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}‚
+          -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
           -DCMAKE_C_COMPILER=${{ matrix.c_compiler }}
           -DCMAKE_CXX_COMPILER=${{ matrix.cpp_compiler }}
           -DCMAKE_TOOLCHAIN_FILE="$VCPKG_INSTALLATION_ROOT/scripts/buildsystems/vcpkg.cmake"