ifnames - Extract CPP conditionals from a set of files

Author

       Written by David J. MacKenzie and Paul Eggert.

Copyright

       Copyright © 2023 Free Software Foundation, Inc.  License GPLv3+/Autoconf: GNU  GPL  version  3  or  later
       <https://gnu.org/licenses/gpl.html>, <https://gnu.org/licenses/exceptions.html>
       This  is  free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent
       permitted by law.

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

Name

       ifnames - Extract CPP conditionals from a set of files

Reporting Bugs

       Report bugs to bug-autoconf@gnu.org, or via Savannah: https://savannah.gnu.org/support/?group=autoconf.

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 Autoconf is maintained as a Texinfo manual.  To read the manual locally, use
       the command

              infoautoconf

       You can also consult the Web version of the manual at https://gnu.org/software/autoconf/manual/.

GNU Autoconf 2.72                                 December 2023                                       IFNAMES(1)