According to README:

---

To install the full version of OCaml Batteries Included in the default
directory (/usr/local/), execute

    $ ./configure
    $ make all opt top syntax install install-doc

(...)

Be patient, documentation generation may take more than 15 minutes.
If you do not want the documentation generation, remove "install-doc"
from the previous commands.

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However, when using --with-godi, "all" implies "install-doc".