Undefined reference when trying to compile

[lipiri]

Hello. I have a problem when trying to compile simple programs using qxmpp, such as the provided example 0. This is my environment:

• Windows 10 x64
• MinGW64 (MSYS2)
• Qt Creator 12.0.0
• Qt 6.6.1
• qxmpp 1.6.0 compiled from source release (also happens with MSYS' qxmpp package)
• cmake 3.28.1 The output of make (after running qmake6) with the error:

  $ make
  make -f Makefile.Release
  make[1]: Entering directory '/d/Documents/untitled1'
  g++ -Wl,-s -Wl,-subsystem,windows -mthreads -o release/untitled1.exe release/main.o release/mainwindow.o release/moc_mainwindow.o C:/msys64/mingw64/lib/libQt6Widgets.dll.a C:/msys64/mingw64/lib/libQt6Gui.dll.a C:/msys64/mingw64/lib/libQt6Network.dll.a C:/msys64/mingw64/lib/libQt6Core.dll.a -lmingw32 C:/msys64/mingw64/lib/libQt6EntryPoint.a -lshell32
  C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: release/main.o:main.cpp:(.text+0x55): undefined reference to `__imp__ZN11QXmppClientC1EP7QObject'
  C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: release/main.o:main.cpp:(.text+0x5e): undefined reference to `__imp__ZNK11QXmppClient6loggerEv'
  C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: release/main.o:main.cpp:(.text+0x6c): undefined reference to `__imp__ZN11QXmppLogger14setLoggingTypeENS_11Lo
  ggingTypeE'
  C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: release/main.o:main.cpp:(.text+0xd0): undefined reference to `__imp__ZN11QXmppClient15connectToServerERK7QSt
  ringS2_'
  C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: release/main.o:main.cpp:(.text+0x10d): undefined reference to `__imp__ZN11QXmppClientD1Ev'
  C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: release/main.o:main.cpp:(.text+0x17a): undefined reference to `__imp__ZN11QXmppClientD1Ev'
  collect2.exe: error: ld returned 1 exit status
  make[1]: *** [Makefile.Release:72: release/untitled1.exe] Error 1
  make[1]: Leaving directory '/d/Documents/untitled1'
  make: *** [Makefile:45: release] Error 2

[lipiri]

I am glad to announce that I have solved this problem. Silly me had forgotten to add the library on Qt Creator. However, there is another problem I found related to compiling qxmpp itself I want to report. When compiling with -DBUILD_OMEMO=ON, I get these warnings:

[197/454] Building CXX object src/omemo/CMakeFiles/QXmppOmemoQt6.dir/QXmppOmemoManager_p.cpp.obj
D:/Desktop/qxmpp-1.6.0/src/omemo/QXmppOmemoManager_p.cpp:231:6: warning: 'bool QXmppOmemoManagerPrivate::initGlobalContext()' redeclared without dllimport attribute after being referenced with dll linkage
  231 | bool ManagerPrivate::initGlobalContext()
      |      ^~~~~~~~~~~~~~
D:/Desktop/qxmpp-1.6.0/src/omemo/QXmppOmemoManager_p.cpp:249:6: warning: 'bool QXmppOmemoManagerPrivate::initLocking()' redeclared without dllimport attribute after being referenced with dll linkage
  249 | bool ManagerPrivate::initLocking()
      |      ^~~~~~~~~~~~~~
D:/Desktop/qxmpp-1.6.0/src/omemo/QXmppOmemoManager_p.cpp:276:6: warning: 'bool QXmppOmemoManagerPrivate::initCryptoProvider()' redeclared without dllimport attribute after being referenced with dll linkage
  276 | bool ManagerPrivate::initCryptoProvider()
      |      ^~~~~~~~~~~~~~

Later, compilation fails with this error:

[454/454] Linking CXX executable tests\tst_qxmppomemomanager.exe
FAILED: tests/tst_qxmppomemomanager.exe
C:\Windows\system32\cmd.exe /C "cd . && C:\msys64\mingw64\bin\c++.exe   tests/CMakeFiles/tst_qxmppomemomanager.dir/tst_qxmppomemom
anager_autogen/mocs_compilation.cpp.obj tests/CMakeFiles/tst_qxmppomemomanager.dir/qxmppomemomanager/tst_qxmppomemomanager.cpp.obj
 -o tests\tst_qxmppomemomanager.exe -Wl,--out-implib,tests\libtst_qxmppomemomanager.dll.a -Wl,--major-image-version,0,--minor-imag
e-version,0  C:/msys64/mingw64/lib/libQt6Test.dll.a  src/omemo/libQXmppOmemoQt6.dll.a  src/libQXmppQt6.dll.a  C:/msys64/mingw64/li
b/libQt6Network.dll.a  -lws2_32  C:/msys64/mingw64/lib/libQt6Xml.dll.a  C:/msys64/mingw64/lib/libqca-qt6.dll.a  C:/msys64/mingw64/
lib/libQt6Core.dll.a  -lmpr  -luserenv  C:/msys64/mingw64/lib/libomemo-c.dll.a  C:/msys64/mingw64/lib/libprotobuf-c.dll.a  -lkerne
l32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32 && cd ."
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: tests/CMakeFiles/tst_qxmppom
emomanager.dir/qxmppomemomanager/tst_qxmppomemomanager.cpp.obj:tst_qxmppomemomanager.cpp:(.text+0xe93): undefined reference to `__
imp__ZN24QXmppOmemoManagerPrivate17initGlobalContextEv'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: tests/CMakeFiles/tst_qxmppom
emomanager.dir/qxmppomemomanager/tst_qxmppomemomanager.cpp.obj:tst_qxmppomemomanager.cpp:(.text+0xef3): undefined reference to `__
imp__ZN24QXmppOmemoManagerPrivate11initLockingEv'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: tests/CMakeFiles/tst_qxmppom
emomanager.dir/qxmppomemomanager/tst_qxmppomemomanager.cpp.obj:tst_qxmppomemomanager.cpp:(.text+0xf50): undefined reference to `__
imp__ZN24QXmppOmemoManagerPrivate18initCryptoProviderEv'
collect2.exe: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

Building without tests succeeds, but I think that might not be good.