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/plasma-keyboard-6.7.5-10/work/plasma-keyboard-6.7.5/src/inputmethod.cpp: In member function ‘virtual void InputMethodContext::zwp_input_method_context_v1_invoke_action(uint32_t, uint32_t)’:
/var/pisi/plasma-keyboard-6.7.5-10/work/plasma-keyboard-6.7.5/src/inputmethod.cpp:89:77: warning: unused parameter ‘button’ [-Wunused-parameter]
   89 | void InputMethodContext::zwp_input_method_context_v1_invoke_action(uint32_t button, uint32_t index)
      |                                                                    ~~~~~~~~~^~~~~~
/var/pisi/plasma-keyboard-6.7.5-10/work/plasma-keyboard-6.7.5/src/inputmethod.cpp:89:94: warning: unused parameter ‘index’ [-Wunused-parameter]
   89 | void InputMethodContext::zwp_input_method_context_v1_invoke_action(uint32_t button, uint32_t index)
      |                                                                                     ~~~~~~~~~^~~~~