[embind] Remove init_embind. NFC (emscripten-core#22705)

All this function was doing was exporting a bunch of library methods. If
folks want to export these functions they can do it themselves using the
normal mechanisms.

ChangeLog.md

@@ -26,6 +26,10 @@ See docs/process.md for more on how version tagging works.
 - Fix regression introduced in 3.1.67 (#22557) which broke webgpu / int64
   integration. (#22689)
 - SDL2 port updated from 2.28.4 to 2.30.8. (#22697)
+- embind no longer exports any library functions by default.  Previously we
+  would export getInheritedInstanceCount, getLiveInheritedInstances,
+  flushPendingDeletes and setDelayFunction.  If you need these library function
+  exprted they can be added to `EXPORTED_RUNTIME_METHODS`. (#22705)
 
 3.1.68 - 09/30/24
 -----------------

src/embind/embind.js

@@ -59,16 +59,6 @@ var LibraryEmbind = {
   }`,
   $EmValOptionalType__deps: ['$EmValType'],
   $EmValOptionalType: '=Object.assign({optional: true}, EmValType);',
-  $init_embind__deps: [
-    '$getInheritedInstanceCount', '$getLiveInheritedInstances',
-    '$flushPendingDeletes', '$setDelayFunction'],
-  $init_embind__postset: 'init_embind();',
-  $init_embind: () => {
-    Module['getInheritedInstanceCount'] = getInheritedInstanceCount;
-    Module['getLiveInheritedInstances'] = getLiveInheritedInstances;
-    Module['flushPendingDeletes'] = flushPendingDeletes;
-    Module['setDelayFunction'] = setDelayFunction;
-  },
 
   $throwUnboundTypeError__deps: ['$registeredTypes', '$typeDependencies', '$UnboundTypeError', '$getTypeName'],
   $throwUnboundTypeError: (message, types) => {
@@ -219,7 +209,6 @@ var LibraryEmbind = {
   },
 
   // raw pointer -> instance
-  $registeredInstances__deps: ['$init_embind'],
   $registeredInstances: {},
 
   $getBasestPointer__deps: ['$throwBindingError'],
@@ -1582,6 +1571,8 @@ var LibraryEmbind = {
     '$releaseClassHandle',
     '$throwBindingError',
     '$detachFinalizer',
+    '$flushPendingDeletes',
+    '$delayFunction',
   ],
   $init_ClassHandle: () => {
     Object.assign(ClassHandle.prototype, {

test/test_other.py

@@ -3240,7 +3240,7 @@ def test_embind(self, *extra_args):
       '-Wno-deprecated-declarations',
       '-lembind',
       '-sRETAIN_COMPILER_SETTINGS',
-      '-sEXPORTED_RUNTIME_METHODS=getCompilerSetting',
+      '-sEXPORTED_RUNTIME_METHODS=getCompilerSetting,setDelayFunction,flushPendingDeletes',
       '-sWASM_ASYNC_COMPILATION=0',
       # This test uses a `CustomSmartPtr` class which has 1MB of data embedded in
       # it which means we need more stack space than normal.

tools/link.py

@@ -1949,6 +1949,7 @@ def run_embind_gen(wasm_target, js_syms, extra_settings, linker_inputs):
       if building.is_wasm_dylib(linker_input):
         safe_copy(linker_input, in_temp(''))
 
+  settings.EXPORTED_RUNTIME_METHODS = []
   # Ignore any options or settings that can conflict with running the TS
   # generation output.
   # Don't invoke the program's `main` function.