Improve robustness of 'make bootstrap'.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/make-dist b/make-dist
index b157d9a54d6..28d2ec15214 100755
--- a/make-dist
+++ b/make-dist
@@ -273,7 +273,7 @@ mkdir ${tempdir}
 ### README while the rest of the tar file is still unpacking.  Whoopee.
 echo "Making links to top-level files"
 ln INSTALL README BUGS ${tempdir}
-ln ChangeLog Makefile.in configure configure.ac ${tempdir}
+ln ChangeLog Makefile.in autogen.sh configure configure.ac ${tempdir}
 ln config.bat make-dist .dir-locals.el ${tempdir}
 ln aclocal.m4 ${tempdir}