Warning:
	Lex, Yacc, and C++ compilers do not necessarily get along.  Your
mileage may vary.  Generally, building this package requires versions of lex
and yacc that are C++ compatible.  If you have such a beast, use it.  If not,
you might consider using y.tab.cc.bison as your y.tab.cc and lex.yy.cc.flex as
lex.yy.cc.
