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File: autoconf.info, Node: autoreconf Invocation, Prev: autoconf Invocation, Up: Making configure Scripts
3.5 Using `autoreconf' to Update `configure' Scripts
====================================================
Installing the various components of the GNU Build System can be
tedious: running `autopoint' for Gettext, `automake' for `Makefile.in'
etc. in each directory. It may be needed either because some tools
such as `automake' have been updated on your system, or because some of
the sources such as `configure.ac' have been updated, or finally,
simply in order to install the GNU Build System in a fresh tree.
`autoreconf' runs `autoconf', `autoheader', `aclocal', `automake',
`libtoolize', and `autopoint' (when appropriate) repeatedly to update
the GNU Build System in the specified directories and their
subdirectories (*note Subdirectories::). By default, it only remakes
those files that are older than their sources. The environment
variables `AUTOM4TE', `AUTOCONF', `AUTOHEADER', `AUTOMAKE', `ACLOCAL',
`AUTOPOINT', `LIBTOOLIZE', `M4', and `MAKE' may be used to override the
invocation of the respective tools.
If you install a new version of some tool, you can make `autoreconf'
remake _all_ of the files by giving it the `--force' option.
*Note Automatic Remaking::, for Make rules to automatically rebuild
`configure' scripts when their source files change. That method
handles the timestamps of configuration header templates properly, but
does not pass `--autoconf-dir=DIR' or `--localdir=DIR'.
Gettext supplies the `autopoint' command to add translation
infrastructure to a source package. If you use `autopoint', your
`configure.ac' should invoke both `AM_GNU_GETTEXT' and
`AM_GNU_GETTEXT_VERSION(GETTEXT-VERSION)'. *Note Invoking the
`autopoint' Program: (gettext)autopoint Invocation, for further details.
`autoreconf' 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 name of each directory `autoreconf' examines and the
commands it runs. If given two or more times, pass `--verbose' to
subordinate tools that support it.
`--debug'
`-d'
Don't remove the temporary files.
`--force'
`-f'
Remake even `configure' scripts and configuration headers that are
newer than their input files (`configure.ac' and, if present,
`aclocal.m4').
`--install'
`-i'
Install the missing auxiliary files in the package. By default,
files are copied; this can be changed with `--symlink'.
If deemed appropriate, this option triggers calls to `automake
--add-missing', `libtoolize', `autopoint', etc.
`--no-recursive'
Do not rebuild files in subdirectories to configure (see *note
Subdirectories::, macro `AC_CONFIG_SUBDIRS').
`--symlink'
`-s'
When used with `--install', install symbolic links to the missing
auxiliary files instead of copying them.
`--make'
`-m'
When the directories were configured, update the configuration by
running `./config.status --recheck && ./config.status', and then
run `make'.
`--include=DIR'
`-I DIR'
Append DIR to the include path. Multiple invocations accumulate.
Passed on to `aclocal', `autoconf' and `autoheader' internally.
`--prepend-include=DIR'
`-B DIR'
Prepend DIR to the include path. Multiple invocations accumulate.
Passed on to `autoconf' and `autoheader' internally.
`--warnings=CATEGORY'
`-W CATEGORY'
Report the warnings related to CATEGORY (which can actually be a
comma separated list).
`cross'
related to cross compilation issues.
`obsolete'
report the uses of obsolete constructs.
`portability'
portability issues
`syntax'
dubious syntactic constructs.
`all'
report all the warnings
`none'
report none
`error'
treats warnings as errors
`no-CATEGORY'
disable warnings falling into CATEGORY
Warnings about `syntax' are enabled by default, and the environment
variable `WARNINGS', a comma separated list of categories, is
honored as well. Passing `-W CATEGORY' actually behaves as if you
had passed `--warnings syntax,$WARNINGS,CATEGORY'. To disable the
defaults and `WARNINGS', and then enable warnings about obsolete
constructs, use `-W none,obsolete'.
If you want `autoreconf' to pass flags that are not listed here on
to `aclocal', set `ACLOCAL_AMFLAGS' in your `Makefile.am'. Due to a
limitation in the Autoconf implementation these flags currently must be
set on a single line in `Makefile.am', without any backslash-newlines.
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