{
    "mode": "man",
    "parameter": "ifnames",
    "section": "1",
    "url": "https://www.chedong.com/phpMan.php/man/ifnames/1/json",
    "generated": "2026-05-30T05:14:52Z",
    "synopsis": "ifnames [OPTION]... [FILE]...",
    "sections": {
        "NAME": {
            "content": "ifnames - Extract CPP conditionals from a set of files\n",
            "subsections": []
        },
        "SYNOPSIS": {
            "content": "ifnames [OPTION]... [FILE]...\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "Scan  all  of  the C source FILES (or the standard input, if none are given) and write to the\nstandard output a sorted list of all the identifiers that appear in  those  files  in  '#if',\n'#elif',  '#ifdef',  or '#ifndef' directives.  Print each identifier on a line, followed by a\nspace-separated list of the files in which that identifier occurs.\n",
            "subsections": [
                {
                    "name": "-h --help",
                    "content": "print this help, then exit\n",
                    "flag": "-h",
                    "long": "--help"
                },
                {
                    "name": "-V --version",
                    "content": "print version number, then exit\n",
                    "flag": "-V",
                    "long": "--version"
                }
            ]
        },
        "AUTHOR": {
            "content": "Written by David J. MacKenzie and Paul Eggert.\n",
            "subsections": []
        },
        "REPORTING BUGS": {
            "content": "Report bugs to <bug-autoconf@gnu.org>.\nGNU Autoconf home page: <https://www.gnu.org/software/autoconf/>.\nGeneral help using GNU software: <https://www.gnu.org/gethelp/>.\n",
            "subsections": []
        },
        "COPYRIGHT": {
            "content": "Copyright © 2021 Free Software Foundation, Inc.  License GPLv3+/Autoconf: GNU GPL  version  3\nor later <https://gnu.org/licenses/gpl.html>, <https://gnu.org/licenses/exceptions.html>\nThis  is free software: you are free to change and redistribute it.  There is NO WARRANTY, to\nthe extent permitted by law.\n",
            "subsections": []
        },
        "SEE ALSO": {
            "content": "autoconf(1), automake(1),  autoreconf(1),  autoupdate(1),  autoheader(1),  autoscan(1),  con‐‐\nfig.guess(1), config.sub(1), ifnames(1), libtool(1).\n\nThe  full  documentation  for ifnames is maintained as a Texinfo manual.  If the info and if‐‐\nnames programs are properly installed at your site, the command\n\ninfo ifnames\n\nshould give you access to the complete manual.\n\n\n\nGNU Autoconf 2.71                            August 2021                                  IFNAMES(1)",
            "subsections": []
        }
    },
    "summary": "ifnames - Extract CPP conditionals from a set of files",
    "flags": [
        {
            "flag": "-h",
            "long": "--help",
            "arg": null,
            "description": "print this help, then exit"
        },
        {
            "flag": "-V",
            "long": "--version",
            "arg": null,
            "description": "print version number, then exit"
        }
    ],
    "examples": [],
    "see_also": [
        {
            "name": "autoconf",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/autoconf/1/json"
        },
        {
            "name": "automake",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/automake/1/json"
        },
        {
            "name": "autoreconf",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/autoreconf/1/json"
        },
        {
            "name": "autoupdate",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/autoupdate/1/json"
        },
        {
            "name": "autoheader",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/autoheader/1/json"
        },
        {
            "name": "autoscan",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/autoscan/1/json"
        },
        {
            "name": "fig.guess",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/fig.guess/1/json"
        },
        {
            "name": "config.sub",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/config.sub/1/json"
        },
        {
            "name": "libtool",
            "section": "1",
            "url": "https://www.chedong.com/phpMan.php/man/libtool/1/json"
        }
    ]
}