Implement incremental linking and add DragonFly BSD VM build

.github/workflows/release.yml

@@ -360,7 +360,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        system: [freebsd, openbsd, netbsd]
+        system: [freebsd, openbsd, netbsd, dragonfly]
     steps:
       - uses: actions/checkout@v4
         with:
@@ -428,6 +428,23 @@ jobs:
           cp target/release/dcr "$ASSET"
           echo "BSD_ASSET=${ASSET}" >> "$GITHUB_ENV"
 
+      # --- DRAGONFLYBSD ---
+      - name: Build in DragonFly BSD VM
+        if: matrix.system == 'dragonfly'
+        uses: vmactions/dragonflybsd-vm@v1
+        with:
+          usesh: true
+          run: |
+            pkg install -y rust perl5 gmake
+            cargo build --release
+
+      - name: Prepare DragonFly BSD Artifact
+        if: matrix.system == 'dragonfly'
+        run: |
+          ASSET="dcr-x86_64-unknown-dragonfly-${{ needs.setup.outputs.version }}"
+          cp target/release/dcr "$ASSET"
+          echo "BSD_ASSET=${ASSET}" >> "$GITHUB_ENV"
+
       # --- UPLOAD TARGET ---
       - name: Upload BSD Asset to Release
         uses: softprops/action-gh-release@v2