macOS + qt5.12.5 + cmake: debug compiled program cannot run,objc[6076]: Class Q** is implemented in both

firecat

My development environment is: macOS Catalina + qt5.12.5 + cmake 3.16.5.
My project's cmakelists.txt is :

cmake_minimum_required(VERSION 3.5)

project(untitled LANGUAGES CXX)

set(CMAKE_INCLUDE_CURRENT_DIR ON)

set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(Qt5 COMPONENTS Widgets REQUIRED)

add_executable(untitled
  main.cpp
  mainwindow.cpp
  mainwindow.h
  mainwindow.ui
)

target_link_libraries(untitled PRIVATE Qt5::Widgets)

I use release to compile and run the executable program, but debug compilation does not work, an error will be reported:

22:58:37: Starting /Users/liq/Documents/myproj/qt-hmi/build-untitled-Desktop_Qt_5_12_5_clang_64bit-Debug/untitled ...
objc[6076]: Class QMacAutoReleasePoolTracker is implemented in both /Users/liq/Qt5.12.5/5.12.5/clang_64/lib/QtCore.framework/Versions/5/QtCore (0x105585200) and /Users/liq/Qt5.12.5/5.12.5/clang_64/lib/QtCore.framework/Versions/5/QtCore_debug (0x10489ade8). One of the two will be used. Which one is undefined.
objc[6076]: Class QT_ROOT_LEVEL_POOL__THESE_OBJECTS_WILL_BE_RELEASED_WHEN_QAPP_GOES_OUT_OF_SCOPE is implemented in both /Users/liq/Qt5.12.5/5.12.5/clang_64/lib/QtCore.framework/Versions/5/QtCore (0x105585278) and /Users/liq/Qt5.12.5/5.12.5/clang_64/lib/QtCore.framework/Versions/5/QtCore_debug (0x10489ae60). One of the two will be used. Which one is undefined.
objc[6076]: Class KeyValueObserver is implemented in both /Users/liq/Qt5.12.5/5.12.5/clang_64/lib/QtCore.framework/Versions/5/QtCore (0x1055852a0) and /Users/liq/Qt5.12.5/5.12.5/clang_64/lib/QtCore.framework/Versions/5/QtCore_debug (0x10489ae88). One of the two will be used. Which one is undefined.
objc[6076]: Class RunLoopModeTracker is implemented in both /Users/liq/Qt5.12.5/5.12.5/clang_64/lib/QtCore.framework/Versions/5/QtCore (0x1055852f0) and /Users/liq/Qt5.12.5/5.12.5/clang_64/lib/QtCore.framework/Versions/5/QtCore_debug (0x10489aed8). One of the two will be used. Which one is undefined.
22:58:37: The process was ended forcefully.

How to solve this problem?

SGaist

Hi,

Looks like you have several versions of Qt installed. Do you have dependencies built with that other version ?

firecat

@SGaist I have qt4.8.7 and Qt5.12.5. My qmake is normal, only cmake debug has problems. what should I do?

firecat

@SGaist said in macOS + qt5.12.5 + cmake: debug compiled program cannot run,objc[6076]: Class Q** is implemented in both:

Hi,

Looks like you have several versions of Qt installed. Do you have dependencies built with that other version ?

I solved this problem. Just delete the configuration file of QtCreator. The path of the file is:
/Users/<username>/.config/QtProject/

Restart QtCreator and everything works!

SGaist

Glad you found out and thanks for sharing !