The no-dev option is deprecated.  Use -Wno-author instead.
CMake Warning (unused-cli):
  Manually-specified variables were not used by the project:

    CMAKE_LD_FLAGS
    ECM_MKSPECS_INSTALL_DIR


Note: Writing kbuildsycoca6.8
Note: Writing kbuildsycoca6.8
Note: Writing kbuildsycoca6.8
Note: Writing kbuildsycoca6.8
Note: Writing kbuildsycoca6.8
Note: Writing kbuildsycoca6.8
Note: Writing kbuildsycoca6.8
Note: Writing kbuildsycoca6.8
Note: Writing kbuildsycoca6.8
Note: Writing kbuildsycoca6.8
Note: Writing kbuildsycoca6.8
/var/pisi/kservice-6.29.0-90/work/kservice-6.29.0/src/sycoca/ksycoca.cpp: In static member function ‘static void KSycoca::setupTestMenu()’:
/var/pisi/kservice-6.29.0-90/work/kservice-6.29.0/src/sycoca/ksycoca.cpp:828:16: warning: ignoring return value of ‘virtual bool QFile::open(QIODeviceBase::OpenMode)’, declared with attribute ‘nodiscard’ [-Wunused-result]
  828 |     output.open(QIODevice::ReadWrite | QIODevice::Truncate);
      |     ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/qt6/QtCore/qdir.h:11,
                 from /usr/include/qt6/QtCore/QDir:1,
                 from /var/pisi/kservice-6.29.0-90/work/kservice-6.29.0/src/sycoca/ksycocautils_p.h:12,
                 from /var/pisi/kservice-6.29.0-90/work/kservice-6.29.0/src/sycoca/ksycoca.cpp:15:
/usr/include/qt6/QtCore/qfile.h:264:32: note: declared here
  264 |     QFILE_MAYBE_NODISCARD bool open(OpenMode flags) override;
      |                                ^~~~