CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_LD_FLAGS
    ECM_MKSPECS_INSTALL_DIR


/var/pisi/kdav-6.28.0-81/work/kdav-6.28.0/src/protocols/caldavprotocol.cpp: In member function ‘virtual void CaldavProtocol::writeMkCol(QXmlStreamWriter&, KDAV::DavCollection&) const’:
/var/pisi/kdav-6.28.0-81/work/kdav-6.28.0/src/protocols/caldavprotocol.cpp:441:32: warning: parameter declaration before lambda trailing return type only optional with ‘-std=c++23’ or ‘-std=gnu++23’ [-Wc++23-extensions]
  441 |         const auto color = [&] -> QString {
      |                                ^~