//! Build script for jailguard.
//!
//! Currently a no-op. The C ABI header at `include/jailguard.h` is
//! committed to git and regenerated explicitly via `make regen-c-header`
//! (which invokes the standalone `cbindgen` binary). This avoids the
//! quirks of running cbindgen from build.rs (where macro expansion is
//! incomplete and several symbols come through as opaque).