compilePackages: eventemitter3 fails to link — undefined _js_event_emitter_* symbols

[proggeramlug]

Perry: origin/main @ a674b6e (v0.5.1167) · macOS arm64
Setup: package compiled natively via perry.compilePackages (perry.allow.compilePackages: ["*"])
Build/run: perry repro.ts -o out && ./out

(Found via an internal real-package stress run — importing the real package and exercising it.)

Bug

Compiling a program that imports eventemitter3 fails at link time. Codegen emits calls to runtime helpers that aren't in the runtime archive:

Undefined symbols for architecture arm64:
  "_js_event_emitter_emit"
  "_js_event_emitter_new_with_options"
  "_js_event_emitter_on"
  "_js_event_emitter_remove_all_listeners"

Looks like eventemitter3 is being routed to a native-EventEmitter codepath whose helper symbols aren't linked into this build.

Repro

import EventEmitter from 'eventemitter3';

const ee = new EventEmitter();
let hits = 0; ee.on('x', (n) => (hits += n));
ee.emit('x', 2); ee.emit('x', 3); ee.removeAllListeners();
ee.emit('x', 100);
console.log(hits);

Expected (Node)

5

Actual (Perry)

Linking failed — undefined `_js_event_emitter_*` symbols