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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
       POSIX.1‐2008,  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 vari‐
		 ables that are unset or null. (See the Base Definitions  vol‐
		 ume  of POSIX.1‐2008, 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

       The  Base  Definitions  volume  of POSIX.1‐2008, Chapter 8, Environment
       Variables, Section 12.2, Utility Syntax Guidelines

COPYRIGHT
       Portions of this text are reprinted and reproduced in  electronic  form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX),	The  Open  Group  Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
       cal and Electronics Engineers,  Inc  and	 The  Open  Group.   (This  is
       POSIX.1-2008  with  the	2013  Technical Corrigendum 1 applied.) 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.unix.org/online.html .

       Any  typographical  or  formatting  errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files  to  man page format. To report such errors, see https://www.ker‐
       nel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group		     2013			     CXREF(1P)
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