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File: autoconf.info, Node: ifnames Invocation, Next: autoconf Invocation, Prev: autoscan Invocation, Up: Making configure Scripts
3.3 Using `ifnames' to List Conditionals
========================================
`ifnames' can help you write `configure.ac' for a software package. It
prints the identifiers that the package already uses in C preprocessor
conditionals. If a package has already been set up to have some
portability, `ifnames' can thus help you figure out what its
`configure' needs to check for. It may help fill in some gaps in a
`configure.ac' generated by `autoscan' (*note autoscan Invocation::).
`ifnames' scans all of the C source files named on the command line
(or the standard input, if none are given) and writes to the standard
output a sorted list of all the identifiers that appear in those files
in `#if', `#elif', `#ifdef', or `#ifndef' directives. It prints each
identifier on a line, followed by a space-separated list of the files
in which that identifier occurs.
`ifnames' accepts the following options:
`--help'
`-h'
Print a summary of the command line options and exit.
`--version'
`-V'
Print the version number of Autoconf and exit.
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2024-05-18 00:26 @3.135.194.15 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)