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Ref: http://lists.gnu.org/archive/html/emacs-devel/2013-10/msg00806.html

* autogen: Remove directory.  Move update_autogen to admin/.
* autogen.sh: Remove reference to copy_autogen.
* GNUmakefile (configure):
* Makefile.in (bootstrap): Do not try to run copy_autogen.
* config.bat: Use msdos/autogen rather than autogen.

* admin/update_autogen: Move here from ../autogen.
(usage): Update.  Remove -l, add -A.
(autogendir): New variable.
(ldefs_flag): Default to set.
(genfiles): Reduce to only ms-dos relevant files.
(main): Make checking autogen sources optional.
Make copying of autogen files optional.

* msdos/autogen/config.in:
* msdos/autogen/Makefile.in: Move here from ../autogen.

* nt/INSTALL: Remove reference to copy_autogen.

* nt/config.nt: Comment.

to create 'configure'; problem reported by Andreas Schwab in
<http://lists.gnu.org/archive/html/emacs-devel/2012-09/msg00438.html>.
* autogen.sh: Exit with status 1 when failing due to missing tools,
reverting the 2012-09-10 change to this file.
* autogen/copy_autogen: Fail if one of the subsidiary actions fail.
Use 'cp -f' for the build-aux files, since the destinations are
typically read-only.

Run autogen.sh after bootstrap-clean, to avoid bzr pull issues.
* INSTALL, README: Document autogen.sh.
* Makefile.in (Makefile): Mark it as precious, since it's updated
atomically.
(MAKE_CONFIG_STATUS): New macro.
(config.status, bootstrap): Use it.  This causes 'make bootstrap'
to run config.status with the --recheck option, which is more
appropriate for a bootstrap.
(bootstrap): Run autogen.sh right after cleaning.  Don't worry
about failures due to missing tools.
* autogen.sh: Exit with status 101 when failing due to missing tools.
* make-dist: Distribute autogen.sh.

Fixes: debbugs:12376

* configure.ac: Require automake 1.11 (fairly arbitrarily).
* autogen.sh (automake_min): Get it from configure.ac.

* src/stamp-h.in: Remove from bzr repository; no longer needed there.
* .bzrignore: Add it.
* autogen.sh: Create it.

Fixes: debbugs:11603

* autogen.sh (get_version): Discard "not found" lines.
(check_version): Respect $AUTOCONF etc environment variables.

Ref: http://lists.gnu.org/archive/html/emacs-devel/2011-03/msg00863.html

* compile, config.guess, config.sub, depcomp, install-sh, missing:
Remove; autoreconf can supply them.

* Makefile.in (sync-from-gnulib): Don't sync config.sub,
config.guess, install-sh.  Pass -i to autoreconf.

* autogen/update_autogen (genfiles): Add compile, config.guess,
config.sub, depcomp, install-sh, missing.  Pass -i to autoreconf.
Discard non-error output from autoreconf in -q case.

* autogen/compile, autogen/config.guess, autogen/config.sub:
* autogen/depcomp, autogen/install-sh, autogen/missing: New files.

* autogen/copy_autogen: Add compile, config.guess, config.sub, depcomp,
install-sh, missing.

* autogen/README: Add compile, config.guess, config.sub, depcomp,
install-sh, missing.

* INSTALL.BZR, admin/make-tarball.txt: Add -i to autoreconf args.

* .bzrignore: Add compile, config.guess, config.sub, depcomp,
install-sh, missing.

* autogen/copy_autogen: Work from ./ or ../.
Fix time-stamps.
* autogen.sh: Doc fix.

Ref: http://lists.gnu.org/archive/html/emacs-devel/2011-03/msg00225.html

* autogen/: New directory, to be excluded from releases.
* autogen/copy_autogen, autogen/update_autogen: New scripts.
* autogen/README: New file.
* autogen/aclocal.m4, autogen/config.in, autogen/configure:
* autogen/Makefile.in: Add auto-updated generated files.

* autogen.sh: No longer a no-op, now it tests for autotools
and runs them as necessary.

* configure.in: Defaule maintainer-mode to on.

* aclocal.m4, configure, lib/Makefile.in: Remove files.

* src/config.in: Remove file.

* INSTALL.BZR, admin/make-tarball.txt: Update instructions.

* INSTALL, autogen.sh, configure.in, configure: Adjust accordingly.