(flex.info.gz) How can I change the matching pattern at run time?

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(flex.info.gz) I get an error about undefined yywrap()

(flex.info.gz) FAQ

(flex.info.gz) How can I expand macros in the input?

 
 How can I change the matching pattern at run time?
 ==================================================
 
 You can't, it's compiled into a static table when flex builds the
 scanner.
 

Info Catalog

(flex.info.gz) I get an error about undefined yywrap()

(flex.info.gz) FAQ

(flex.info.gz) How can I expand macros in the input?