Add basic github actions

.github/workflows/compile.yml

@@ -0,0 +1,78 @@
+name: SFML_CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build_linux:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 5
+
+    - name: Install dependencies
+      run: |
+        sudo apt update
+        sudo apt install -y libsfml-dev
+
+    - name: Build
+      run: |
+        mkdir build/ && cd build/
+        cmake -DCMAKE_BUILD_TYPE=Release ..
+        make -j4
+
+  build_linux_static:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 5
+
+    - name: Install dependencies
+      run: |
+        sudo apt update
+        sudo apt install -y libsfml-dev
+
+    - name: Build
+      run: |
+        mkdir build/ && cd build/
+        cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_STATIC=TRUE ..
+        make -j4
+
+  build_macos:
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 5
+
+    - name: Install dependencies
+      run: |
+        brew install sfml
+
+    - name: Build
+      run: |
+        mkdir build/ && cd build/
+        cmake -DCMAKE_BUILD_TYPE=Release ..
+        make -j4
+
+  build_windows:
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 5
+
+    - name: Install dependencies
+      run: |
+        vcpkg install sfml
+
+    - name: Build
+      run: |
+        mkdir build/ && cd build/
+        cmake -DCMAKE_BUILD_TYPE=Release ..
+        cmake --build .