\version "2.9.13"
melody = \relative c' {
  \clef treble
  \key c \major
  \time 4/4
  
  f4 e8[ c] d4 g |
  a2 ~ a2 |
}

harmonies = \chordmode {
  c4:m f:min7 g:maj c:aug d2:dim b:sus
}

\score {
  <<
    \override Score.ChordName #'extra-offset = #'(0.0 . 1.5)
    \new ChordNames {
      \set chordChanges = ##t
      \harmonies
    }
    \new Staff \melody
  >>
  \layout{ }
}