Packages with the xref use flag

app-emacs / slime : SLIME, the Superior Lisp Interaction Mode (Extended)

  • Install xref.lisp cross-referencing tool

app-emacs / sly : Sylvester the Cat's Common Lisp IDE for GNU Emacs

  • Install xref.lisp cross-referencing tool

dev-ada / gnatcoll-db : GNAT Component Collection

  • Build xref library