IFNAMES(1)                       User Commands                      IFNAMES(1)

       ifnames - Extract CPP conditionals from a set of files

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

       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

       Written by David J. MacKenzie and Paul Eggert.

       Report bugs to <bug-autoconf@gnu.org>.
       GNU Autoconf home page: <http://www.gnu.org/software/autoconf/>.
       General help using GNU software: <http://www.gnu.org/gethelp/>.

       Copyright (C) 2012 Free Software Foundation, Inc.  License GPLv3+/Auto-
       conf: GNU GPL version 3  or  later  <http://gnu.org/licenses/gpl.html>,
       This  is  free  software:  you  are free to change and redistribute it.
       There is NO WARRANTY, to the extent permitted by law.

       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.

GNU Autoconf 2.69                 August 2017                       IFNAMES(1)
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