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Details

Type: Bug
Resolution: Done
Priority: P1: Critical
Fix Version/s: 6.0.0 RC
Affects Version/s: 6.0.0
Component/s: Build System: CMake
Labels:
- cmake_qt6
Environment:

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* Windows 10 2004 x64
* Clang x86 Release (built from Git) 9.0.1 and 10.0.1
* CMake x64 3.17.3 and 3.18.0-RC2
* VS 2019 (x64 Host, x86 Target) 16.6.2 and 16.6.3
* Qt 6 latest Submodule Merge
* Ninja x64 pre-built 1.10.0 and latest 1.10.0git
* Python x86 3.8.2
* Perl x86 5.30.2

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* Windows 10 2004 x64 * Clang x86 Release (built from Git) 9.0.1 and 10.0.1 * CMake x64 3.17.3 and 3.18.0-RC2 * VS 2019 (x64 Host, x86 Target) 16.6.2 and 16.6.3 * Qt 6 latest Submodule Merge * Ninja x64 pre-built 1.10.0 and latest 1.10.0git * Python x86 3.8.2 * Perl x86 5.30.2

Platform/s:

Windows
Epic Link:
CMake Port: Milestone 4
Commits:
7ec0786d78c7420244d488553d7d10eee4fe60b2 (qt/qtbase/dev) 5b136abd21803988f96b9b66c992822efbef97ec (qt/tqtc-qtbase/dev)

Description

With the above mentioned Software Configuration, I keep running into the Error "ITERATOR_DEBUG_LEVEL mismatch" and hundreds of connected errors with multiple Clang and LLVM Files.

At the end, the VS Linker (Link.exe) says:
LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library
qtbase\bin\lupdate.exe : fatal error LNK1319: 1044 mismatches detected

This also happens when I do a build with all Tools being x86_64 and Host and Target are x86_64 - so it is not a bitness Issue.
Obviously no Issue with pure Release builds.

Build Script (CMD, VS CMD Prompt) (WIP once again thanks to that Issue):

@echo off
title BUILD QT-X86 DEV DEBUG AND RELEASE DYNAMIC MSVC
:START
set CL=/MP%NUMBER_OF_PROCESSORS% /cgthreads8 /utf-8 /nologo
set LINK=/CGTHREADS:%NUMBER_OF_PROCESSORS%
set LLVM_INSTALL_DIR=%SystemDrive%\Dev\LLVMx86\
set PATH=%PATH%;%SystemDrive%\Dev\CMake\bin\;%SystemDrive%\Dev\Ninja\;%SystemDrive%\Dev\Perlx86\perl\bin\;%SystemDrive%\Dev\Pythonx86\;%SystemDrive%\Dev\LLVMx86\bin\;%SystemDrive%\Git\bin\

cd %SystemDrive%\Dev\QtSrcx86DMSVC\ && ^
cmake %SystemDrive%\Dev\QtSDev\qt5\ --debug-output --debug-find --log-level=DEBUG -G"Ninja" -DCMAKE_BUILD_TYPE="Debug" -DCMAKE_INSTALL_PREFIX=%SystemDrive%\Dev\Qtx86DevDebugMSVC\ -DBUILD_WITH_PCH=OFF -DBUILD_qt3d=OFF -DBUILD_qtandroidextras=OFF -DBUILD_qtquick3d=OFF -DBUILD_qtquicktimeline=OFF -DBUILD_qtshadertools=OFF -DBUILD_qtvirtualkeyboard=OFF -DBUILD_qtwayland=OFF -DFEATURE_debug_and_release=OFF -DFEATURE_dynamicgl=ON -DFEATURE_icu=OFF -DFEATURE_opengl_dynamic=ON -DFEATURE_openssl=OFF -DFEATURE_openssl_linked=OFF && ^
ninja -v -j%NUMBER_OF_PROCESSORS% 1>C:\Dev\qt6_cmake_debug_lupdate_error_%DATE:/=-%.log 2>&1

See attached Log File for more Details about this Issue ~~(as soon Jira starts working again...)~~