To support building on older systems, this infrastructure allows
bundling libraries. At the moment, this is just GLib.
The intent of this system is that a "ostree-embeddeps.tar.gz" is
created, which can be used as input to an RPM or Debian package, which
can then be installed on older operating systems.
To create one, use:
$ cd embedded-dependencies
$ make -f Makefile.bootstrap embedded-glib-download
$ cd ..
$ make release-tarball-embedded
To build it:
$ ./configure --enable-embedded-glib ...
as usual.