EDIT: Thanks to botje below for the pointer. Switching it to inline worked, as well as shifting the definition out to a cpp file
I'm using Automoc with my CMake project and I keep getting this error below.
I don't see why this would result in duplicate symbols? It seems like automoc is to blame here but it's hard to test that since I need to run moc on these files anyway.
Error
duplicate symbol __Z3foov in:
CMakeFiles/Foo.dir/main.cpp.o
CMakeFiles/Foo.dir/MainWindow.cpp.o
duplicate symbol __Z3foov in:
CMakeFiles/Foo.dir/main.cpp.o
CMakeFiles/Foo.dir/Foo_autogen/mocs_compilation.cpp.o
ld: 2 duplicate symbols for architecture x86_64
I can't see what would cause this error at all. Here's a very minimal project that replicates the issue. A CMake file below and the files in my project.
I'm compiling this on a Mac and from inside CLion, though of course the error happens outside of CLion too since it's not doing anything special.
CMakeLists.txt
cmake_minimum_required(VERSION 3.13)
project(Foo)
set(CMAKE_CXX_STANDARD 17)
set(SOURCE_FILES
main.cpp MainWindow.cpp MainWindow.h constants.h)
find_package(Qt5
${QT5_USE_VERSION}
COMPONENTS
Widgets
Core
PATHS
/usr/local/opt/qt5
REQUIRED)
set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOMOC ON)
add_executable(${PROJECT_NAME} ${SOURCE_FILES})
qt5_use_modules(${PROJECT_NAME} Widgets Core)
main.cpp
#include <QApplication>
#include <QPushButton>
#include "MainWindow.h"
int main(int argc, char **argv) {
QApplication app(argc, argv);
MainWindow win;
win.show();
return app.exec();
}
MainWindow.h
#ifndef FOO_MAINWINDOW_H
#define FOO_MAINWINDOW_H
#include <QMainWindow>
#include "constants.h"
class MainWindow: public QMainWindow {
Q_OBJECT
};
#endif //FOO_MAINWINDOW_H
mainWindow.cpp
// Empty File
constants.h
#ifndef FOO_CONSTANTS_H
#define FOO_CONSTANTS_H
int foo() {
return 0;
}
#endif //FOO_CONSTANTS_H
Anyway any help would be appreciated, I'm hitting a wall with this and it looks like it should be something simple that I'm simply missing.
