NAME

       ifnames - Extract CPP conditionals from a set of files

SYNOPSIS

       ifnames [OPTION] ...  [FILE] ...

DESCRIPTION

       Scan all of the C source FILES (or the standard input, if none are given) and write to the
       standard output a sorted list of all the identifiers that appear in those files in  `#if',
       `#elif',  `#ifdef', or `#ifndef' directives.  Print each identifier on a line, followed by
       a space-separated list of the files in which that identifier occurs.

       -h, --help
              print this help, then exit

       -V, --version
              print version number, then exit

AUTHOR

       Written by David J. MacKenzie and Paul Eggert.

REPORTING BUGS

       Report bugs to <bug-autoconf@gnu.org>.

COPYRIGHT

       Copyright © 2003 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is NO  warranty;  not
       even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO

       autoconf(1),   automake(1),   autoreconf(1),  autoupdate(1),  autoheader(1),  autoscan(1),
       config.guess(1), config.sub(1), ifnames(1), libtool(1).

       The full documentation for ifnames is maintained as a Texinfo manual.   If  the  info  and
       ifnames programs are properly installed at your site, the command

              info ifnames

       should give you access to the complete manual.