Add workflow for ffi build

Author: roastpiece

.github/workflows/main-ffi.yml

@@ -0,0 +1,42 @@
+# This is a basic workflow to help you get started with Actions
+
+name: CI (FFI)
+
+# Controls when the action will run.
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ macos-latest, ubuntu-latest ]
+
+    # The operating system of the runner the job will run on
+    runs-on: ${{ matrix.os }}
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      # prepare system for libffi build
+      - name: install dependencies
+        run: libffi/.ci/install.sh
+
+      # Build it
+      - name: build 
+        run: make all
+        env:
+          UMKA_LIBFFI: 1