Remove unneeded asyncify imports/exports for JSPI mode. (#19136)

Author: brendandahl

emcc.py

@@ -2110,7 +2110,7 @@ def phase_linker_setup(options, state, newargs):
       '__stack_pointer',
     ]
 
-    if settings.ASYNCIFY:
+    if settings.ASYNCIFY == 1:
       settings.DEFAULT_LIBRARY_FUNCS_TO_INCLUDE += [
         '__asyncify_state',
         '__asyncify_data'

emscripten.py

@@ -314,7 +314,7 @@ def emscript(in_wasm, out_wasm, outfile_js, memfile):
   if settings.RELOCATABLE and settings.MEMORY64 == 2:
     metadata.imports += ['__memory_base32']
 
-  if settings.ASYNCIFY:
+  if settings.ASYNCIFY == 1:
     metadata.exports += ['asyncify_start_unwind', 'asyncify_stop_unwind', 'asyncify_start_rewind', 'asyncify_stop_rewind']
 
   update_settings_glue(out_wasm, metadata)
@@ -365,7 +365,7 @@ def emscript(in_wasm, out_wasm, outfile_js, memfile):
     if settings.INITIAL_TABLE == -1:
       settings.INITIAL_TABLE = dylink_sec.table_size + 1
 
-    if settings.ASYNCIFY:
+    if settings.ASYNCIFY == 1:
       metadata.imports += ['__asyncify_state', '__asyncify_data']
 
   if metadata.invokeFuncs:

src/library.js

@@ -3623,7 +3623,7 @@ mergeInto(LibraryManager.library, {
 #if SUPPORT_LONGJMP == 'wasm'
   __c_longjmp: "new WebAssembly.Tag({'parameters': ['{{{ POINTER_WASM_TYPE }}}']})",
 #endif
-#if ASYNCIFY
+#if ASYNCIFY == 1
   __asyncify_state: "new WebAssembly.Global({'value': 'i32', 'mutable': true}, 0)",
   __asyncify_data: "new WebAssembly.Global({'value': 'i32', 'mutable': true}, 0)",
 #endif