You may require the minimum version of Bison to process the grammar. If
the requirement is not met,
bison exits with an error (exit
Some deprecated behaviors are disabled for some required version:
The C++ deprecated files position.hh and stack.hh are no longer generated.
To comply with the
of the Graphviz team, use the
.gv extension instead of
for the name of the generated DOT file. See Graphviz.