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 (C) 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 Debian project regards the full documentation for ifnames to be
non-free, so it is not included in Debian. Nevertheless, the non-free
distribution that accompanies Debian includes the manual in its
autoconf-doc package. Otherwise, you may be able to access the
Autoconf manual online.