[esm-integration] Export embind bindings. (emscripten-core#24388)

Adds the embind bindings to re-export the functions in the support file.
As with modularize instance, this requires EMBIND_AOT to work.

Author: brendandahl

test/test_core.py

@@ -18,7 +18,7 @@
   raise Exception('do not run this file directly; do something like: test/runner')
 
 from tools.shared import PIPE
-from tools.shared import EMCC, EMAR, FILE_PACKAGER
+from tools.shared import EMCC, EMAR, EMXX, FILE_PACKAGER
 from tools.utils import WINDOWS, MACOS, LINUX, write_file, delete_file
 from tools import shared, building, config, utils, webassembly
 import common
@@ -9753,12 +9753,14 @@ def test_modularize_instance(self, args):
 
     self.assertContained('main1\nmain2\nfoo\nbar\nbaz\n', self.run_js('runner.mjs'))
 
+  @no_4gb('EMBIND_AOT can\'t lower 4gb')
   def test_modularize_instance_embind(self):
-    self.run_process([EMCC, test_file('modularize_instance_embind.cpp'),
+    self.run_process([EMXX, test_file('modularize_instance_embind.cpp'),
                       '-sMODULARIZE=instance',
+                      '-Wno-experimental',
                       '-lembind',
                       '-sEMBIND_AOT',
-                      '-o', 'modularize_instance_embind.mjs'])
+                      '-o', 'modularize_instance_embind.mjs'] + self.get_emcc_args())
 
     create_file('runner.mjs', '''
       import init, { foo, Bar } from "./modularize_instance_embind.mjs";

tools/link.py

@@ -2028,6 +2028,8 @@ def run_embind_gen(options, wasm_target, js_syms, extra_settings):
   # Ignore -sMODULARIZE which could otherwise effect how we run the module
   # to generate the bindings.
   settings.MODULARIZE = False
+  # Disable ESM integration to avoid enabling the experimental feature in node.
+  settings.WASM_ESM_INTEGRATION = False
   # Don't include any custom user JS or files.
   settings.PRE_JS_FILES = []
   settings.POST_JS_FILES = []
@@ -2109,6 +2111,9 @@ def phase_embind_aot(options, wasm_target, js_syms):
 // end embind exports'''
     src += exports
   write_file(final_js, src)
+  if settings.WASM_ESM_INTEGRATION:
+    # With ESM integration the embind exports also need to be exported by the main file.
+    settings.EXPORTED_RUNTIME_METHODS.extend(out['publicSymbols'])
 
 
 # for Popen, we cannot have doublequotes, so provide functionality to