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+.TH BISON 1 local
+.SH NAME
+bison \- GNU Project parser generator (yacc replacement)
+.SH SYNOPSIS
+.B bison
+[
+.B \-dvy
+] file
+.SH DESCRIPTION
+.I Bison
+is a parser generator in the style of
+.IR yacc (1).
+It should be upwardly compatible with input files designed
+for
+.IR yacc .
+.PP
+Input files should follow the
+.I yacc
+convention of ending in ``.y''.
+Unlike
+.IR yacc ,
+the generated files do not have fixed names, but instead use the prefix
+of the input file.
+For instance, a grammar description file named
+.B parse.y
+would produce the generated parser in a file named
+.BR parse.tab.c ,
+instead of
+.IR yacc 's
+.BR y.tab.c .
+.PP
+.I Bison
+takes three optional flags.
+.TP
+.B \-d
+Produce a
+.B .tab.h
+file, similar to
+.IR yacc 's
+.B y.tab.h
+file.
+.TP
+.B \-v
+Be verbose. Analogous to the same flag for
+.IR yacc .
+.TP
+.B \-y
+Use fixed output file names. I.e., force the output to be in files
+.BR y.tab.c ,
+.BR y.tab.h ,
+and so on. This is for full
+.I yacc
+compatibility.
+.SH FILES
+/usr/local/lib/bison.simple	simple parser
+.br
+/usr/local/lib/bison.hairy	complicated parser
+.SH SEE ALSO
+.IR yacc (1)
+.SH DIAGNOSTICS
+``Self explanatory.''
+... ha!