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

NAME
       cxref - generate a C-language program cross-reference table (DEVELOPMENT)

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 ta-
       ble.  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  symbol
       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, Inter-
	      nationalization Variables 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  interna-
	      tionalization 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  argu-
	      ments and input files).

       LC_MESSAGES
	      Determine the locale that should be used to affect the format and contents of diag-
	      nostic 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  func-
	  tion name itself), and line number references.

	* Each	line number may be preceded by an asterisk ( '*' ) flag, meaning that this is the
	  declaring reference. Other single-character flags,  with  implementation-defined  mean-
	  ings, 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 standard 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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003					 CXREF(P)
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