--- qt-everywhere-src-5.15.17\qtscript\src\script\script.pro.orig
+++ qt-everywhere-src-5.15.17\qtscript\src\script\script.pro
@@ -62,7 +62,7 @@
 load(qt_module)
 # Override the module default, as it breaks compilation with libc++>=5.0:
 # auto_ptr is no longer part of the c++1z standard.
-CONFIG -= c++1z
+CONFIG -= c++1z c++2a c++2b
 
 android-clang:equals(ANDROID_TARGET_ARCH, armeabi-v7a) {
     QMAKE_CFLAGS_RELEASE -= -mthumb