CVS log for bootstrap

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Change the way that autoreconf is run:
  bootstrap now substitutes %%PREFIX%% into new configure.ac.in, to
    produce configure.ac;
  it does that before running autoreconf, rather than afterwards;
  so configure.ac has been removed (see the Attic for its history) and
    configure.ac.in has been created -- the two are essentially
    identical.
Added notes about this to README.

Add some more explanation about %%PREFIX%%.
Remove gratuitous cleverness about copying links.

Change --buildsupport=X to --buildsupport-prefix=X, making this
  orthogonal to --buildsupport.
Change MANIFEST Makefile variable to MANIFESTS, reflecting change to
  GenerateDependencies (which was in turn forced by changes to
  automake/lib/am/install.am).
Do not fail if we can't make $STARCONF_DEFAULT_PREFIX/bin.  If that
  is actually /star/bin, then we might not be allowed to, and if
  --prefix is not /star, then we didn't want to anyway, so we don't
  care that we can't.

Adjustments so that any failures of individual steps lead promptly to
  a suitable message to stderr, and a non-zero exit status.  Thus a
  zero exit status of this script should indeed mean that the
  bootstrapping process has been successful.

Add argument to --buildsupport option, to allow you to require that
  the buildsupport tools _not_ be installed in
  STARCONF_DEFAULT_PREFIX/buildsupport, but in the given directory
  instead.  This means that the tools are installed in the given
  directory, but when they are used, the --prefix in the ./configure
  files they generate defaults to STARCONF_DEFAULT_PREFIX.

Do a non-recursive configure at the end, so that we do get a Makefile
  created, which is sufficient to support 'make configure-deps'
  _before_ running ./configure.
Check whether 'make configure-deps' is necessary, and advise the user
  if so.

Improve the test for an sufficiently recent GNU m4

--buildsupport target now removes all buildsupport manifests using
  (new) clean-buildsupport target in Makefile.dependencies.  This
  forces all buildsupport tools to be rebuilt in this case.  No
  change for non --buildsupport call.
Option --buildsupport-only renamed to plain --buildsupport, and
  option --force-starconf removed, now it's redundant with --buildsupport.

Add --force to the autoreconf in buildsupport/ -- I don't know why,
  but it's suddenly become necessary, since the missing and
  install-sh links weren't being added without this option.

Make handling of $(JAVA) consistent.  configure.ac substitutes
  JAVA=NOJAVA if no Java can be found in the path.  Now Makefile.in
  tests for this, rather than JAVA being empty, and ./bootstrap sets
  this when it's making its temporary Makefile.tmp

Add a test to make sure that none of PWD or
STARCONF_DEFAULT_{PREFIX,STARLINK} have a space in them.  This is
natural on OSX or Windows, but autoconf has a deep problem with it, so
we should exit cleanly now, rather than in a heap later.

Clarifications to comments

Add --force-starconf option, and improve --help.

Because I removed buildsupport from AC_CONFIG_SUBDIRS, autoreconf
  doesn't recurse into it, so the install-sh which we filch from there
  isn't made.  So add a (cd buildsupport && autoreconf).

After autoreconf, snarf a copy of buildsupport/install-sh, since this
  isn't automatically created in the top level.

Add a test to see whether the local m4 (or at least the first m4 in
  the path) is GNU m4, and to build and install thirdparty/fsf/m4
  before the other buildsupport tools if it is not.

Omit `touch' of Makefile.dependencies.  Change to Makefile.in makes
this unnecessary.

Create the directory $STARCONF_DEFAULT_PREFIX/bin if we can.  If this
exists, then the starconf installation (see
buildsupport/starconf/Makefile.am) adds convenience links from there
to some of its applications in $BUILDSUPPORT_PREFIX/bin.

Make sure that componentinfo.dtd is present, by linking explicitly to
  the _uninstalled_ version in starconf (Makefile rules require this
  to be present, but it hasn't been installed at this point)
Remove creation and stocking of config/ directory -- config/install-sh
  is now checked in

Default STARCONF_DEFAULT_PREFIX as well as ..._STARLINK, and report
  the results.
Touch Makefile.dependencies so that make doesn't try remaking it too early
The autoreconf is now done _after_ the recursive bootstrapping
Make sure that an install-sh ends up in the config directory, config/.

When bootstrapping the children, have the variable
STAR_SUPPRESS_AUTORECONF set to `true', so that the various bootstrap
files do not themselves run autoreconf.  Only after the bootstrapping
is complete, run autoreconf once here, and then edit %%PREFIX%% again
at that point.

Add an elaborate call to `make buildsupport', which, using the
  dependency information in Makefile.dependencies, configures and
  installs the packages which go into .../buildsupport.
Carefully default BUILDSUPPORT_PREFIX and co
Crucially call `starconf --show STARCONF_DEFAULT_PREFIX` to determine
  the correct prefix, and edit it in to the ./configure immediately
  after running autoconf.

Initial versions -- still preliminary