Help with make syntax

[Phil Holmes]

Documentation: GNUmakefile has the following:

info: $(INFO_FILES)
@echo export LILYPOND_DATADIR=$(LILYPOND_DATADIR)
@echo export PYTHONPATH=$(PYTHONPATH)

which sends stuff to the terminal during a make doc run.  I've read the make 
manual but still can't decide whether this actually does anything, or merely 
echoes information to the terminal.  Could a make-guru explain, and propose 
an alternative syntax which does the same thing without the terminal output?

TIA

--
Phil Holmes