Using Qt5 with CLion and having this problem

Fuchsiaff

So since my QtCreator syntax highlighting doesn't work, I decided to try out CLion.

Here's my cmake file:

cmake_minimum_required(VERSION 3.1.0)

project(untitled)

set (CMAKE_PREFIX_PATH "/Users/fuchsiaff/Qt/5.12.0/clang_64")
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

# Find includes in corresponding build directories
set(SOURCE_FILES main.cpp mainer.cpp mainer.h)
add_executable(untitled ${SOURCE_FILES})

set(CMAKE_INCLUDE_CURRENT_DIR ON)
# Instruct CMake to run moc automatically when needed
set(CMAKE_AUTOMOC ON)
# Create code from a list of Qt designer ui files

# Find the QtWidgets library
find_package(Qt5 REQUIRED COMPONENTS Core Widgets Gui)

# Use the Widgets module from Qt 5
target_link_libraries(untitled Qt5::Core Qt5::Widgets Qt5::Gui)

The program compiles just fine when there are no class definitions but as soon as I add Mainer.h and Mainer.cpp to my code

Mainer.h :

#ifndef MAINER_H
#define MAINER_H

#include <QWidget>

class mainer : public QWidget
{
Q_OBJECT
public:
    explicit mainer(QWidget *parent = nullptr);

signals:

public slots:
};

#endif // MAINER_H

Mainer.cpp :

#include "mainer.h"

mainer::mainer(QWidget *parent) : QWidget(parent)
{

}

And after trying to compile that, I get this error:

[ 33%] Linking CXX executable untitled
Undefined symbols for architecture x86_64:
  "vtable for mainer", referenced from:
      mainer::mainer(QWidget*) in mainer.cpp.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[3]: *** [untitled] Error 1
make[2]: *** [CMakeFiles/untitled.dir/all] Error 2
make[1]: *** [CMakeFiles/untitled.dir/rule] Error 2
make: *** [untitled] Error 2

Christian Ehrlicher

@Fuchsiaff said in Using Qt5 with CLion and having this problem:

add_executable

move this after setting automoc option - otherwise automoc is not enabled I would guess

Fuchsiaff

@Christian-Ehrlicher

THANK YOU!!!

It worked!

bogong

@Fuchsiaff Have you got good experience in using CLion with QT? I've got a lot of troubles with QT Creator only for last month dozen of crashes and broken highlighting. I am seeking alternative because there are always something wrong with Qt Creator.