Question
How do I compile, link and call different YACC grammars using yyparse()
in one program?
Solution
Use the -p option for each separate yacc grammar generation
-p prefix
Use prefix instead of yy as the prefix for all external
names produced by yacc. For X/Open compliance, when the
environment variable _XPG is set, then the -p option will work
as described in the previous sentence. If the environment
variable _XPG is not set, then the -p option will work as
described below in the -P option.
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