(flex.info.gz) Why do I get "conflicting types for yylex" error?

Info Catalog

(flex.info.gz) What is the difference between YYLEX_PARAM and YY_DECL?

(flex.info.gz) FAQ

(flex.info.gz) How do I access the values set in a Flex action from within a Bison action?

 
 Why do I get "conflicting types for yylex" error?
 =================================================
 
 This is a compiler error regarding a generated Bison parser, not a Flex
 scanner.  It means you need a prototype of yylex() in the top of the
 Bison file.  Be sure the prototype matches YY_DECL.
 

Info Catalog

(flex.info.gz) What is the difference between YYLEX_PARAM and YY_DECL?

(flex.info.gz) FAQ

(flex.info.gz) How do I access the values set in a Flex action from within a Bison action?