Support macOS portability and testing

- Export DYLD_LIBRARY_PATH on macOS to find bundled shared libraries.
- Add macOS portability test in GitHub Actions using artifacts and 1-day retention.

Author: Largo

.github/workflows/test-on-push.yml

@@ -54,6 +54,34 @@ jobs:
           bundle exec rake build
           bundle exec rake test
 
+      - name: Build helloworld for cross-system test
+        run: ruby -Ilib exe/ocran test/fixtures/helloworld/helloworld.rb --output helloworld_packed
+
+      - name: Upload packed binary
+        uses: actions/upload-artifact@v4
+        with:
+          name: helloworld-macos-${{ matrix.ruby }}
+          path: helloworld_packed
+          retention-days: 1
+
+  test-macos-portability:
+    needs: run-tests-macos
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby: [ '3.2', '3.3', '3.4', '4.0' ]
+    runs-on: macos-latest
+    steps:
+      - name: Download packed binary
+        uses: actions/download-artifact@v4
+        with:
+          name: helloworld-macos-${{ matrix.ruby }}
+
+      - name: Run packed executable
+        run: |
+          chmod +x helloworld_packed
+          ./helloworld_packed
+
   run-tests-windows:
     strategy:
       fail-fast: false

lib/ocran/direction.rb

@@ -145,7 +145,11 @@ def construct(builder)
 
       # On POSIX systems, set LD_LIBRARY_PATH to find bundled shared libraries
       unless Gem.win_platform?
-        builder.export("LD_LIBRARY_PATH", File.join(EXTRACT_ROOT, BINDIR.to_s))
+        extract_bin = File.join(EXTRACT_ROOT, BINDIR.to_s)
+        builder.export("LD_LIBRARY_PATH", extract_bin)
+        if RUBY_PLATFORM.include?("darwin")
+          builder.export("DYLD_LIBRARY_PATH", extract_bin)
+        end
       end
 
       # Windows-only: Add detected DLLs