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
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.
print this help, then exit
print version number, then exit
Written by David J. MacKenzie and Paul Eggert.
© 2012 Free Software Foundation, Inc. License
GPLv3+/Autoconf: GNU GPL version 3 or later
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
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
should give you access to the complete manual.