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File: autoconf.info, Node: autoscan Invocation, Next: ifnames Invocation, Prev: Writing Autoconf Input, Up: Making configure Scripts
3.2 Using `autoscan' to Create `configure.ac'
=============================================
The `autoscan' program can help you create and/or maintain a
`configure.ac' file for a software package. `autoscan' examines source
files in the directory tree rooted at a directory given as a command
line argument, or the current directory if none is given. It searches
the source files for common portability problems and creates a file
`configure.scan' which is a preliminary `configure.ac' for that
package, and checks a possibly existing `configure.ac' for completeness.
When using `autoscan' to create a `configure.ac', you should
manually examine `configure.scan' before renaming it to `configure.ac';
it probably needs some adjustments. Occasionally, `autoscan' outputs a
macro in the wrong order relative to another macro, so that `autoconf'
produces a warning; you need to move such macros manually. Also, if
you want the package to use a configuration header file, you must add a
call to `AC_CONFIG_HEADERS' (*note Configuration Headers::). You might
also have to change or add some `#if' directives to your program in
order to make it work with Autoconf (*note ifnames Invocation::, for
information about a program that can help with that job).
When using `autoscan' to maintain a `configure.ac', simply consider
adding its suggestions. The file `autoscan.log' contains detailed
information on why a macro is requested.
`autoscan' uses several data files (installed along with Autoconf)
to determine which macros to output when it finds particular symbols in
a package's source files. These data files all have the same format:
each line consists of a symbol, one or more blanks, and the Autoconf
macro to output if that symbol is encountered. Lines starting with `#'
are comments.
`autoscan' 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.
`--verbose'
`-v'
Print the names of the files it examines and the potentially
interesting symbols it finds in them. This output can be
voluminous.
`--debug'
`-d'
Don't remove temporary files.
`--include=DIR'
`-I DIR'
Append DIR to the include path. Multiple invocations accumulate.
`--prepend-include=DIR'
`-B DIR'
Prepend DIR to the include path. Multiple invocations accumulate.
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)