omitted from the build process when appropriate, but never from
the dist process.
* configure.in: Don't edit all_subdirs depending on the
availability of Tk; let that be the list of all PLUGIN
subdirectories present, as it used to be. Instead, edit a new
variable, build_subdirs; write its final value, the list of
subdirs we do want to compile in, to config.build-subdirs.
Substitute that into the top-level Makefile too.
* Makefile.in (subdirs): Set this to @build_subdirs@, so we only
recurse on the subdirectories we should build.
(distdirs): Set this to @existingdirs@, so it includes the subdirs
we decided not to build.
* configure.in: If we can find the library for tcl7.5, build
gtcltk-lib. Call AC_PROG_CC, to help run that test with the right
compiler (not sure this is necessary).
snapshots. Other changes in subdirectories.
* Makefile.in (dist): Rewritten --- the old target was out of
date, dependent on files that we don't have, and relied on GNU
tar. The new target is simpler.
(VERSION, srcdir, dist_dirs): New variables.
(DISTFILES): Renamed from localfiles. Added GUILE-VERSION and
TODO.
(localtreats): Variable removed. We don't have this file.
(info): cd to doc and make info there; don't make info in every
${subdir}; those Makefiles don't know what to do.
(distname, distdir, treats, announcefile): Variables removed.
(manifest-file): Target removed.
(dist-dir): New target, responsible for distributable files in
this directory.
(GZIP, GZIP_EXT, TAR_VERBOSE, DIST_NAME): New variables,
controlling the 'dist' target.
* configure.in: Substitute GUILE-VERSION into the top-level
Makefile. Build doc/Makefile from doc/Makefile.in.
