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(bison.info)Environment Variables

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Environment Variables
=====================

   Here is a list of environment variables which affect the way Bison
runs.

`BISON_SIMPLE'
`BISON_HAIRY'
     Much of the parser generated by Bison is copied verbatim from a
     file called `bison.simple'.  If Bison cannot find that file, or if
     you would like to direct Bison to use a different copy, setting the
     environment variable `BISON_SIMPLE' to the path of the file will
     cause Bison to use that copy instead.

     When the `%semantic_parser' declaration is used, Bison copies from
     a file called `bison.hairy' instead.  The location of this file can
     also be specified or overridden in a similar fashion, with the
     `BISON_HAIRY' environment variable.


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