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CXREF(1P)		   POSIX Programmer's Manual		     CXREF(1P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the	 corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.

NAME
       cxref - generate a C-language program cross-reference  table  (DEVELOP‐
       MENT)

SYNOPSIS
       cxref [-cs][-o file][-w num] [-D name[=def]]...[-I dir]...
	      [-U name]... file ...

DESCRIPTION
       The  cxref  utility  shall analyze a collection of C-language files and
       attempt to build a cross-reference  table.   Information	 from  #define
       lines  shall be included in the symbol table. A sorted listing shall be
       written to standard output of all symbols (auto, static, and global) in
       each  file separately, or with the -c option, in combination. Each sym‐
       bol shall contain an asterisk before the declaring reference.

OPTIONS
       The cxref utility shall conform	to  the	 Base  Definitions  volume  of
       IEEE Std 1003.1-2001,  Section  12.2, Utility Syntax Guidelines, except
       that the order of the -D, -I, and -U options (which  are	 identical  to
       their  interpretation  by  c99)	is  significant. The following options
       shall be supported:

       -c     Write a combined cross-reference of all input files.

       -s     Operate silently; do not print input filenames.

       -o  file
	      Direct output to named file.

       -w  num
	      Format output no wider than num (decimal) columns.  This	option
	      defaults to 80 if num is not specified or is less than 51.

       -D     Equivalent to c99.

       -I     Equivalent to c99.

       -U     Equivalent to c99.

OPERANDS
       The following operand shall be supported:

       file   A pathname of a C-language source file.

STDIN
       Not used.

INPUT FILES
       The input files are C-language source files.

ENVIRONMENT VARIABLES
       The  following  environment  variables  shall  affect  the execution of
       cxref:

       LANG   Provide a default value for the  internationalization  variables
	      that  are	 unset	or  null.  (See the Base Definitions volume of
	      IEEE Std 1003.1-2001, Section  8.2,  Internationalization	 Vari‐
	      ables  for the precedence of internationalization variables used
	      to determine the values of locale categories.)

       LC_ALL If set to a non-empty string value, override the values  of  all
	      the other internationalization variables.

       LC_COLLATE

	      Determine the locale for the ordering of the output.

       LC_CTYPE
	      Determine	 the  locale  for  the	interpretation of sequences of
	      bytes of text data as characters (for  example,  single-byte  as
	      opposed to multi-byte characters in arguments and input files).

       LC_MESSAGES
	      Determine	 the  locale  that should be used to affect the format
	      and contents of diagnostic messages written to standard error.

       NLSPATH
	      Determine the location of message catalogs for the processing of
	      LC_MESSAGES .

ASYNCHRONOUS EVENTS
       Default.

STDOUT
       The  standard  output  shall  be	 used for the cross-reference listing,
       unless the -o option is used to select a different output file.

       The format of standard output is unspecified, except that the following
       information shall be included:

	* If the -c option is not specified, each portion of the listing shall
	  start with the name of the input file on a separate line.

	* The name line shall be followed by a sorted list  of	symbols,  each
	  with	its  associated location pathname, the name of the function in
	  which it appears (if it is not a function  name  itself),  and  line
	  number references.

	* Each	line number may be preceded by an asterisk ( '*' ) flag, mean‐
	  ing that this is the	declaring  reference.  Other  single-character
	  flags, with implementation-defined meanings, may be included.

STDERR
       The standard error shall be used only for diagnostic messages.

OUTPUT FILES
       The  output  file named by the -o option shall be used instead of stan‐
       dard output.

EXTENDED DESCRIPTION
       None.

EXIT STATUS
       The following exit values shall be returned:

	0     Successful completion.

       >0     An error occurred.

CONSEQUENCES OF ERRORS
       Default.

       The following sections are informative.

APPLICATION USAGE
       None.

EXAMPLES
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       c99

COPYRIGHT
       Portions of this text are reprinted and reproduced in  electronic  form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX),	The  Open  Group  Base
       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
       event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard
       is  the	referee document. The original Standard can be obtained online
       at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group		     2003			     CXREF(1P)
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