CI: add emsdk workflow

.github/workflows/emsdk.yml

@@ -0,0 +1,66 @@
+name: Build InfiniSim LVGL Simulator using emscripten
+  # Run on all branches
+  push:
+    branches: []
+
+  # Also run this Workflow when a Pull Request is created or updated in the "main" and "develop" Branch
+  pull_request:
+    branches: [ main, develop ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+
+      #########################################################################################
+      # Download and Install Dependencies
+
+      - name: Setup emsdk
+        uses: mymindstorm/setup-emsdk@v11
+        with:
+          # Make sure to set a version number!
+          version: 3.1.8
+          # This is the name of the cache folder.
+          # The cache folder will be placed in the build directory,
+          #  so make sure it doesn't conflict with anything!
+          actions-cache-folder: 'emsdk-cache'
+
+      - name: Tell emsdk to use SDL with pthread proxy fix
+        run: sed -i -e "s/^TAG =.*/TAG = 'ea7d5307acfb1daf9af6104b60b75114b15bcd27'/" -e "s/HASH =.*/HASH = 'b7d58124f0d1145f23338abfdb6aa07855ac74ed80b3a5b613d23b4930c84d04d1794a62aab2ca2680ba369128ee2028ea51236fab4aaf70556036172fa59e6a'/" emsdk-cache/upstream/emscripten/tools/ports/sdl2.py
+
+      - name: Verify
+        run: emcc -v
+
+      - name: Install cmake
+        uses: lukka/[email protected]
+
+      #########################################################################################
+      # Checkout
+
+      - name: Checkout source files
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      #########################################################################################
+      # CMake
+
+      - name: CMake
+        run:  |
+          emcmake cmake -S . -B build_em -DCMAKE_BUILD_TYPE=Release
+
+      #########################################################################################
+      # Build and Upload simulator wasm files
+
+      - name: Build simulator executable
+        run:  |
+          cmake --build build_lv_sim
+
+      - name: Upload simulator executable
+        uses: actions/upload-artifact@v3
+        with:
+          name: infinisim_emscripten
+          path: |
+            build_em/infinisim.html
+            build_em/infinisim.js
+            build_em/infinisim.wasm