try msys

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

@@ -35,8 +35,8 @@ jobs:
             build_type: Debug
           - os: windows-latest
             generator: Ninja
-            c_compiler: cl
-            cpp_compiler: cl
+            c_compiler: gcc
+            cpp_compiler: g++
             build_type: Debug
           - os: ubuntu-latest
             generator: Ninja
@@ -90,6 +90,20 @@ jobs:
       run: |
         brew install ninja
 
+    - uses: Install MSYS2 (windows)
+      if: matrix.os == 'windows-latest' && matrix.generator == 'Ninja'
+      uses: msys2/setup-msys2@v2
+      with:
+        msystem: ${{matrix.sys}}
+        update: true
+        install: >-
+          git
+          make
+        pacboy: >-
+          toolchain:p
+          cmake:p
+          ninja:p
+
     - name: Set reusable strings
       # Turn repeated input strings (such as the build output directory) into step outputs. These step outputs can be used throughout the workflow file.
       id: strings
@@ -101,6 +115,7 @@ jobs:
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
       # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
+      shell: bash
       run: |
         cmake -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} -DCMAKE_CXX_COMPILER=${{ matrix.cpp_compiler }} -DCMAKE_C_COMPILER=${{ matrix.c_compiler }} -S "${{ steps.strings.outputs.source-dir }}" -B "${{ steps.strings.outputs.build-output-dir }}" -G "${{matrix.generator}}"