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 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 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, Internationalization  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  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, meaning 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 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
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .