add compile workflow

add fuzzing instrumentation

.github/workflows/build.yaml

@@ -0,0 +1,28 @@
+name: build
+
+on:
+  push:
+
+jobs:
+  compile:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        compiler: [gcc, clang++]
+
+    name: compile
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+
+      - if: matrix.os == 'windows-latest' && matrix.compiler == 'clang++'
+        uses: KyleMayes/install-llvm-action@v1
+        with:
+          version: "11.0"
+
+      - if: matrix.os == 'windows-latest' && matrix.compiler == 'gcc'
+        uses: egor-tensin/setup-mingw@v2
+
+      - name: build
+        run: ${{ matrix.compiler }} -o scanner.o -I./src -c src/scanner.cc