hakorune/tools/selfhost/examples/hako_llvm_selfhost_driver.hako

// hako_llvm_selfhost_driver.hako — minimal driver to emit+link via C‑API from Hako
// Usage (env):
//   _MIR_JSON: v1 JSON text
//   _EXE_OUT : output path for linked executable
// Prints the exe path to stdout.

using selfhost.vm.helpers.mir_call_v1_handler as MirCallV1HandlerBox // not required but keeps linker alive

static box Main {
  method main(args) {
    local j = env.get("_MIR_JSON")
    local exe_out = env.get("_EXE_OUT")
    if j == null { print("[ERR] _MIR_JSON not set"); return 1 }
    if exe_out == null { exe_out = "/tmp/hako_selfhost_exe" }
    // emit object
    local a = new ArrayBox(); a.push(j)
    local obj = hostbridge.extern_invoke("env.codegen", "emit_object", a)
    if obj == null { print("[ERR] emit_object failed"); return 2 }
    // link exe
    local b = new ArrayBox(); b.push(obj); b.push(exe_out)
    local exe = hostbridge.extern_invoke("env.codegen", "link_object", b)
    if exe == null { print("[ERR] link_object failed"); return 3 }
    print("" + exe)
    return 0
  }
}