Add initial build workflow

.github/workflows/build.yml

@@ -0,0 +1,39 @@
+
+name: IRAF macOS build
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: macos-14
+
+    env:
+      iraf: ${{ github.workspace }}/src/
+      TERM: ansi
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Checkout IRAF
+        uses: actions/checkout@v3
+        with:
+          repository: iraf-community/iraf
+          path: ${{ env.iraf }}
+
+      - name: Build IRAF
+        run: |
+          make -C src IRAFARCH=macos64 CFLAGS="-g -O2"
+
+      - name: Run tests
+        run: |
+         make -C src test
+
+      - name: Installation
+        run: |
+          mkdir install
+          make -C src DESTDIR=`pwd`/install
+
+      - name: Create distribution file
+        run: |
+          tar cvf iraf-v2.17.1_macos.tar.gz -C install .