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/purpose-6.30.0-81/work/purpose-6.30.0/src/externalprocess/purposeprocess_main.cpp: In function ‘int main(int, char**)’:
/var/pisi/purpose-6.30.0-81/work/purpose-6.30.0/src/externalprocess/purposeprocess_main.cpp:124:76: note: ‘#pragma message: warning: make QGuiApplication, consider QCoreApplication?’
  124 | #pragma message("warning: make QGuiApplication, consider QCoreApplication?")
      |                                                                            ^