From 90a6c5aaf8c5504b3cd66e1018f93877771a1976 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Morten=20S=C3=B8rvig?= <morten.sorvig@qt.io>
Date: Wed, 5 Mar 2025 13:17:24 +0100
Subject: [PATCH] wasm: set MAXIMUM_MEMORY to 2GB when JSPI is in use
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Work around Emscripten bug which triggers runtime exception

   WebAssembly.promising(): Argument 0 must be a
   WebAssembly exported function

This was already done for cmake, this adds the qmake
part.

Change-Id: Ieb3e89e9931a25f16c23ba2bce27bef33a91de53
Reviewed-by: Piotr Wierciński <piotr.wiercinski@qt.io>
---
 mkspecs/features/wasm/wasm.prf | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/mkspecs/features/wasm/wasm.prf b/mkspecs/features/wasm/wasm.prf
index c1a1a3a73e7..c1089e430e0 100644
--- a/mkspecs/features/wasm/wasm.prf
+++ b/mkspecs/features/wasm/wasm.prf
@@ -49,7 +49,11 @@ exists($$QMAKE_QT_CONFIG) {
     }
     EMCC_LFLAGS += -s INITIAL_MEMORY=$$INITIAL_MEMORY
     isEmpty(QT_WASM_MAXIMUM_MEMORY) {
-        MAXIMUM_MEMORY = 4GB # 32-bit max
+        qtConfig(wasm-jspi) {
+            MAXIMUM_MEMORY = 2GB # Avoid triggering Emscripten bug #23834
+        } else {
+            MAXIMUM_MEMORY = 4GB # 32-bit max
+        }
     } else {
         MAXIMUM_MEMORY = $$QT_WASM_MAXIMUM_MEMORY
     }