Leex in parser tutorial 1.0

["mickael_remond"@REDACTED]

I did not manage to figure out how to use leex in the parser tutorial
contrib.

The make function in ecc_parse refers to leex:gen, but there is no
leex.erl. There is only a leex.hrl in the directory, with no gen function
exported.

What should I do to run this complete example (the yecc part seems to
produce a valide parser by the way).

Thanks in advance for your help.

Mickaël Rémond