

XREF (1)                     1/1/79                      XREF (1)




NAME
   xref - make a cross reference of symbols

SYNOPSIS
   xref [-f] [files ...]

DESCRIPTION
   Xref  produces  a  cross-reference list of the symbols in each
   of the named files on the standard  output.   Each  symbol  is
   listed  followed  by  the  numbers  of  the  lines in which it
   appears.   If  no  files  are  given,  or  the  file  "-"   is
   specified, xref reads the standard input. 

   A   symbol   is  defined  as  a  string  of  letters,  digits,
   underlines, or periods that begins  with  a  letter.   Symbols
   exceeding  an  internal  limit  are  truncated.  This limit is
   determined by the MAXTOK definition in the  source  code,  and
   is currently set to 15. 

   Normally,   xref  treats  upper-  and  lower-case  letters  as
   different characters.  The -f option causes all letters to  be
   folded to lower-case. 

DIAGNOSTICS
   out of storage
      The  file  contains  too  many symbols or references to fit
      within the current limitations of xref.  The  size  of  the
      buffer  is  determined  by  the  MAXBUF  definition  in the
      source code. 

AUTHORS
   David Hanson and friends (U. of Arizona)

BUGS/DEFICIENCIES
   There should be a means of suppressing "junk" symbols such  as
   "the", "a", etc. 























