Add workflow for cmake

.github/workflows/build.yml

@@ -0,0 +1,48 @@
+name: build
+
+on:
+  push:
+    branches:
+      - '*'
+    tags:
+      - '*'
+  pull_request:
+    branches:
+      - '*'
+
+env:
+  BUILD_TYPE: Release
+
+jobs:
+  build_for_linux:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: recursive
+    - name: Set up dependencies
+      run: |
+        sudo apt-get update && \
+        sudo apt-get install \
+          cmake \
+          ninja-build \
+          libjack-jackd2-dev \
+          liblo-dev \
+          libgl-dev \
+          libcairo2-dev \
+          libx11-dev
+    - name: Create Build Environment
+      shell: bash
+      working-directory: ${{runner.workspace}}
+      run: cmake -E make_directory build
+    - name: Configure CMake
+      shell: bash
+      working-directory: ${{runner.workspace}}/build
+      run: |
+        cmake "$GITHUB_WORKSPACE" -G Ninja \
+          -DCMAKE_BUILD_TYPE="$BUILD_TYPE" \
+          -DDPF_EXAMPLES=ON
+    - name: Build all
+      shell: bash
+      working-directory: ${{runner.workspace}}/build
+      run: cmake --build . --config "$BUILD_TYPE" -j 2