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Type: Bug
Resolution: Fixed
Priority: P1: Critical
Fix Version/s: 6.6.1, 6.7.0 FF
Affects Version/s: 6.0.0 RC
Component/s: Core: Other
Labels:
None
Environment:

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c:\Qt\Qt6.6.0_20_static_compile>icx --version
icx --version
Intel(R) oneAPI DPC++/C++ Compiler for applications running on Intel(R) 64, Version 2023.2.0 Build 20230627
Copyright (C) 1985-2023 Intel Corporation. All rights reserved.

Intel(R) oneAPI DPC++/C++ Compiler 2023.2.0 (2023.2.0.20230627)
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: C:\PROGRA~2\Intel\oneAPI\compiler\latest\windows\bin-llvm
Configuration file: C:\PROGRA~2\Intel\oneAPI\compiler\latest\windows\bin-llvm\..\bin\icx.cfg

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c:\Qt\Qt6.6.0_20_static_compile>icx --version icx --version Intel(R) oneAPI DPC++/C++ Compiler for applications running on Intel(R) 64, Version 2023.2.0 Build 20230627 Copyright (C) 1985-2023 Intel Corporation. All rights reserved. Intel(R) oneAPI DPC++/C++ Compiler 2023.2.0 (2023.2.0.20230627) Target: x86_64-pc-windows-msvc Thread model: posix InstalledDir: C:\PROGRA~2\Intel\oneAPI\compiler\latest\windows\bin-llvm Configuration file: C:\PROGRA~2\Intel\oneAPI\compiler\latest\windows\bin-llvm\..\bin\icx.cfg

Platform/s:

Windows
Commits:
19f54b901 (dev), 3b873fb7a (6.6)

Changes in 6.6.0 rc to support int128 cause compilation to fail with the following error.

C:\Qt\qt-everywhere-src-6.6.0-rc\qtbase\src\corelib\global\qtypes.cpp(521,1): error: static assertion failed due to requirement 'std::numeric_limits<unsigned __int128>::max() == static_cast<unsigned __int128>(-1)'
static_assert(std::numeric_limits<quint128>::max() == Q_UINT128_MAX);
^             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:\Qt\qt-everywhere-src-6.6.0-rc\qtbase\src\corelib\global\qtypes.cpp(521,52): note: expression evaluates to '0 == 340282366920938463463374607431768211455'
static_assert(std::numeric_limits<quint128>::max() == Q_UINT128_MAX); 
              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~