(autoconf.info)config.status Invocation


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16 config.status Invocation
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The `configure' script creates a file named `config.status', which
actually configures, "instantiates", the template files.  It also
records the configuration options that were specified when the package
was last configured in case reconfiguring is needed.

   Synopsis:
     ./config.status OPTION... [FILE...]

   It configures the FILES; if none are specified, all the templates
are instantiated.  The files must be specified without their
dependencies, as in

     ./config.status foobar

not

     ./config.status foobar:foo.in:bar.in

   The supported options are:

`--help'
`-h'
     Print a summary of the command line options, the list of the
     template files, and exit.

`--version'
`-V'
     Print the version number of Autoconf and the configuration
     settings, and exit.

`--silent'
`--quiet'
`-q'
     Do not print progress messages.

`--debug'
`-d'
     Don't remove the temporary files.

`--file=FILE[:TEMPLATE]'
     Require that FILE be instantiated as if
     `AC_CONFIG_FILES(FILE:TEMPLATE)' was used.  Both FILE and TEMPLATE
     may be `-' in which case the standard output and/or standard
     input, respectively, is used.  If a TEMPLATE file name is
     relative, it is first looked for in the build tree, and then in
     the source tree.  Note: Configuration Actions, for more details.

     This option and the following ones provide one way for separately
     distributed packages to share the values computed by `configure'.
     Doing so can be useful if some of the packages need a superset of
     the features that one of them, perhaps a common library, does.
     These options allow a `config.status' file to create files other
     than the ones that its `configure.ac' specifies, so it can be used
     for a different package.

`--header=FILE[:TEMPLATE]'
     Same as `--file' above, but with `AC_CONFIG_HEADERS'.

`--recheck'
     Ask `config.status' to update itself and exit (no instantiation).
     This option is useful if you change `configure', so that the
     results of some tests might be different from the previous run.
     The `--recheck' option reruns `configure' with the same arguments
     you used before, plus the `--no-create' option, which prevents
     `configure' from running `config.status' and creating `Makefile'
     and other files, and the `--no-recursion' option, which prevents
     `configure' from running other `configure' scripts in
     subdirectories.  (This is so other Make rules can run
     `config.status' when it changes; Note: Automatic Remaking, for
     an example).

   `config.status' checks several optional environment variables that
can alter its behavior:

 -- Variable: CONFIG_SHELL
     The shell with which to run `configure' for the `--recheck'
     option.  It must be Bourne-compatible.  The default is a shell that
     supports `LINENO' if available, and `/bin/sh' otherwise.  Invoking
     `configure' by hand bypasses this setting, so you may need to use
     a command like `CONFIG_SHELL=/bin/bash /bin/bash ./configure' to
     insure that the same shell is used everywhere.  The absolute name
     of the shell should be passed.

 -- Variable: CONFIG_STATUS
     The file name to use for the shell script that records the
     configuration.  The default is `./config.status'.  This variable is
     useful when one package uses parts of another and the `configure'
     scripts shouldn't be merged because they are maintained separately.

   You can use `./config.status' in your makefiles.  For example, in
the dependencies given above (Note: Automatic Remaking),
`config.status' is run twice when `configure.ac' has changed.  If that
bothers you, you can make each run only regenerate the files for that
rule:
     config.h: stamp-h
     stamp-h: config.h.in config.status
             ./config.status config.h
             echo > stamp-h

     Makefile: Makefile.in config.status
             ./config.status Makefile

   The calling convention of `config.status' has changed; see *Note
Obsolete config.status Use::, for details.


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