Create file ../gradle.properties with contents:
llvmInstallPath=/path/to/llvm
Create a Gradle subproject somewhere under ../, using ../InteropExample as a template.
To generate the interop stubs and libraries and build all sources you can run
the following command from ../:
./gradlew InteropExample:build
To run the example (if 'application' plugin is enabled):
./gradlew InteropExample:run