From cd73301a2e088ee03d2b505a3eb4edc14e83fb52 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Morten=20S=C3=B8rvig?= <morten.sorvig@qt.io>
Date: Thu, 18 Aug 2022 23:47:43 +0200
Subject: [PATCH] wasm: disable asyncify for non-static builds
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The asyncify support in the event loop currently uses
EM_JS, which Emscripten does not support using from
side modules.

Change-Id: I5f961d9cd12f7b1b6cc1c2382b807a1da2918725
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Reviewed-by: Mikołaj Boc <Mikolaj.Boc@qt.io>
---
 src/corelib/kernel/qeventdispatcher_wasm.cpp | 23 ++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/corelib/kernel/qeventdispatcher_wasm.cpp b/src/corelib/kernel/qeventdispatcher_wasm.cpp
index 7ae29e616d..cd7d3583b4 100644
--- a/src/corelib/kernel/qeventdispatcher_wasm.cpp
+++ b/src/corelib/kernel/qeventdispatcher_wasm.cpp
@@ -32,6 +32,8 @@ Q_LOGGING_CATEGORY(lcEventDispatcherTimers, "qt.eventdispatcher.timers");
 // track Qts own usage of asyncify.
 static bool g_is_asyncify_suspended = false;
 
+#if defined(QT_STATIC)
+
 EM_JS(bool, qt_have_asyncify_js, (), {
     return typeof Asyncify != "undefined";
 });
@@ -54,6 +56,27 @@ EM_JS(void, qt_asyncify_resume_js, (), {
     setTimeout(wakeUp);
 });
 
+#else
+
+// EM_JS is not supported for side modules; disable asyncify
+
+bool qt_have_asyncify_js()
+{
+    return false;
+}
+
+void qt_asyncify_suspend_js()
+{
+    Q_UNREACHABLE();
+}
+
+void qt_asyncify_resume_js()
+{
+    Q_UNREACHABLE();
+}
+
+#endif // defined(QT_STATIC)
+
 // Returns true if asyncify is available.
 bool qt_have_asyncify()
 {