Fail to build when mixing Qt6 and Qt5 libraries

That function (PianoKeybd::useCustomNoteNames) belongs to Drumstick::Widgets since a long time ago. See: https://drumstick.sourceforge.io/docs/classdrumstick_1_1widgets_1_1PianoKeybd.html#ae0680db70e0f1f8b72d4ea71e722978f

And src/CMakeLists.txt:176-183 links to Drumstick::Widgets among other libraries:

target_link_libraries(vmpk PRIVATE
    Drumstick::RT
    Drumstick::Widgets
    Qt${QT_VERSION_MAJOR}::Widgets
    $<$<BOOL:${ENABLE_DBUS}>:Qt${QT_VERSION_MAJOR}::DBus>
    $<$<BOOL:${Qt5X11Extras_FOUND}>:Qt5::X11Extras>
    $<$<BOOL:${XCB_FOUND}>:${XCB_LIBRARIES}>
)

So, I can't see any bug or problem on Drumstick or VMPK.

So, you may be right blaming GCC 13, which may be buggy. But anyway, Qt6 supported platforms only lists GCC 9, 10 and 11 at this moment: https://doc.qt.io/qt-6/linux.html

I've just now built VMPK with GCC 12 with correct results right now, though. I will try newer compilers later.

I can't change gcc in Debian, as gcc 13 is the defaults.

vmpk is build with QT5
A build with QT6 solve this issue

For Qt5, the supported compilers are GCC-5 to GCC-10: https://doc.qt.io/qt-5/linux.html

Beware that building Drumstick with Qt6 requires the Core5Compat module for Drumstick::File, https://doc.qt.io/qt-6/qtcore5-index.html

Recompiling Drumstick with Qt6, you will need to recompile also the other Drumstick programs.

Yes, I already built drumstick with Qt6 hence this error.
For packages dependencies, isn't a problem as I built at least one package under a chroot and I'll quickly see if a dependency is missing.

Thanks got your work.

I've just now built drumstick 2.8 and vmpk 0.8.9, both with Qt 5.15 and GCC 13.1.1 in Fedora 38. It produced a few warnings, but worked well.

So, the problem is that you have built Drumstick with Qt6, but then you tried to build VMPK with Qt5. This should be detected earlier at configure time, when running CMake, instead of producing an error at compile/link time.

This looks like a common problem. For instance, in AUR (Arch Linux) kmetronome

Drumstick 2.8.1 will have a check, with a specific error message: [drumstick:git:914aad]