Problem with class type for dll

[d_stranz]

According to the docs on creating shared libraries, you should be including "<QtCore/QtGlobal>", not "<QtCore/qglobal>".

[cleopa]

I have made the change "<QtCore/QtGlobal>"instead of"<QtCore/qglobal>" but nothing changed. I still get the same error. I have to mention that I am using a C++ compiler and the OS is Linux

[d_stranz]

Well, yeah, if you look at the contents of QtGlobal, it is:

#include "qglobal.h"

#include "qglobal.h"

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But in any case, these export and import macros are only used for building Windows DLLs. They are not used on linux platforms, and are typically #define to be nothing, usually something like this:

#ifdef _WIN32 || _WIN64
    #define Q_DECL_EXPORT __declspec(dllexport)
    #define Q_DECL_IMPORT __declspec(dllimport)
#else
    #define Q_DECL_EXPORT
    #define Q_DECL_IMPORT
#endif

#ifdef _WIN32 || _WIN64
    #define Q_DECL_EXPORT __declspec(dllexport)
    #define Q_DECL_IMPORT __declspec(dllimport)
#else
    #define Q_DECL_EXPORT
    #define Q_DECL_IMPORT
#endif

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So in fact you don't need to put any type of declaration in front of your class names.

[ChrisW67]

I have to mention that I am using a C++ compiler and the OS is Linux

Posted code compiles and links as-is for me: Linux, GCC 9.3.0, Qt 5.12.8

chrisw@newton:/tmp/tt$ qmake
Info: creating stash file /tmp/tt/.qmake.stash
 
chrisw@newton:/tmp/tt$ make
g++ -c -pipe -O2 -Wall -W -D_REENTRANT -fPIC -DPROFILE1_LIBRARY -DQT_DEPRECATED_WARNINGS -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -I. -isystem /usr/include/x86_64-linux-gnu/qt5 -isystem /usr/include/x86_64-linux-gnu/qt5/QtGui -isystem /usr/include/x86_64-linux-gnu/qt5/QtCore -I. -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++ -o profile1.o profile1.cpp
rm -f libprofile1.so.1.0.0 libprofile1.so libprofile1.so.1 libprofile1.so.1.0
g++ -Wl,-O1 -shared -Wl,-soname,libprofile1.so.1 -o libprofile1.so.1.0.0 profile1.o  /usr/lib/x86_64-linux-gnu/libQt5Gui.so /usr/lib/x86_64-linux-gnu/libQt5Core.so /usr/lib/x86_64-linux-gnu/libGL.so -lpthread    
ln -s libprofile1.so.1.0.0 libprofile1.so
ln -s libprofile1.so.1.0.0 libprofile1.so.1
ln -s libprofile1.so.1.0.0 libprofile1.so.1.0

chrisw@newton:/tmp/tt$ qmake
Info: creating stash file /tmp/tt/.qmake.stash

chrisw@newton:/tmp/tt$ make
g++ -c -pipe -O2 -Wall -W -D_REENTRANT -fPIC -DPROFILE1_LIBRARY -DQT_DEPRECATED_WARNINGS -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -I. -isystem /usr/include/x86_64-linux-gnu/qt5 -isystem /usr/include/x86_64-linux-gnu/qt5/QtGui -isystem /usr/include/x86_64-linux-gnu/qt5/QtCore -I. -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++ -o profile1.o profile1.cpp
rm -f libprofile1.so.1.0.0 libprofile1.so libprofile1.so.1 libprofile1.so.1.0
g++ -Wl,-O1 -shared -Wl,-soname,libprofile1.so.1 -o libprofile1.so.1.0.0 profile1.o  /usr/lib/x86_64-linux-gnu/libQt5Gui.so /usr/lib/x86_64-linux-gnu/libQt5Core.so /usr/lib/x86_64-linux-gnu/libGL.so -lpthread    
ln -s libprofile1.so.1.0.0 libprofile1.so
ln -s libprofile1.so.1.0.0 libprofile1.so.1
ln -s libprofile1.so.1.0.0 libprofile1.so.1.0

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I'd be trying a clean rebuild:

$ make distclean
$ qmake
$ make

$ make distclean
$ qmake
$ make

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