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


/var/pisi/kguiaddons-6.30.0-94/work/kguiaddons-6.30.0/src/systemclipboard/waylandpipewriterhelper.cpp: In function ‘WaylandPipeWriterHelper::SafeWriteResult WaylandPipeWriterHelper::safeWriteWithTimeout(int, const char*, qsizetype, qsizetype, std::chrono::nanoseconds)’:
/var/pisi/kguiaddons-6.30.0-94/work/kguiaddons-6.30.0/src/systemclipboard/waylandpipewriterhelper.cpp:32:37: warning: logical ‘or’ of equal expressions [-Wlogical-op]
   32 |                 if (errno == EAGAIN || errno == EWOULDBLOCK)
      |                                     ^