# Compiler driver (llmcpp)

A **compiler driver** coordinates source transformation and ordinary compilation. `llmc++` can stop at generated C++, or continue to a native program:

```bash
# Generate function bodies and write main.llm.cpp.
$ llmc++ --llm main.cpp

# Reuse those cached bodies and build an executable.
$ llmc++ -fllm-offline main.cpp -o main
```

The first command requests source output; the second requires usable cache entries and performs normal compilation. Generation needs a configured backend when the cache cannot satisfy a target.

The driver separates `-fllm-*` settings from arguments passed to Clang, including include paths and language options. The finished program contains ordinary compiled implementations, so calling a generated function does not contact a model.