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  iden-
    tifiers 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.

    Copyright 2002 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.

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

    ifnames (GNU Autoconf) 2.57

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.