Symbol's function definition is void: x-register-dnd-atom

[Óscar Fuentes]

On a custom Emacs build (made to avoid dumping) invoking the executable
ends with that message after loading a bunch of files:

<... lots elided ...>
Loading tooltip...
Loading tooltip...done
Finding pointers to doc strings...
Finding pointers to doc strings...done
Symbol's function definition is void: x-register-dnd-atom

x-register-dnd-atom is defined in xselect.c, which is included in the
build. It is configured with USE_X_TOOLKIT USE_LUCID

Any hints about why the message appears?

Any other suggestion about how to make a functional Emacs binary without
dumping would be useful too. (The build already sets CANNOT_DUMP)

Running the executable with -nw fails too:

$ src/qemacs -Q -nw
emacs: Cannot open terminfo database file

On a normal build temacs starts fine in terminal mode.