Create msys2.yml

.github/workflows/msys2.yml

@@ -0,0 +1,22 @@
+name: MSYS2 build
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: windows-latest
+
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+
+      - name: Setup MSYS2
+        uses: msys2/setup-msys2@v2
+        with:
+          path-type: strict
+
+      # Runs a single command using the runners shell
+      - name: Make MINGW32
+        run: |
+          set MSYSTEM=MINGW32
+          msys2 -c 'make'