On Wed, Aug 04 2021, pukkamustard wrote:

> * gnu/packages/ocaml.scm (ocaml-lwt-log): New variable.
> ---
>  gnu/packages/ocaml.scm | 24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
>
> diff --git a/gnu/packages/ocaml.scm b/gnu/packages/ocaml.scm
> index e832adc069..d475b75287 100644
> --- a/gnu/packages/ocaml.scm
> +++ b/gnu/packages/ocaml.scm
> @@ -7404,6 +7404,30 @@ establishing TCP and SSL/TLS connections from @code{ocaml-conduit} using
>  @code{ocaml-lwt}.")
>      (license license:isc)))
>  
> +(define-public ocaml-lwt-log
> +  (package
> +    (name "ocaml-lwt-log")
> +    (version "1.1.1")
> +    (home-page "https://github.com/ocsigen/lwt_log")
> +    (source
> +     (origin
> +       (method git-fetch)
> +       (uri (git-reference
> +             (url home-page)
> +             (commit version)))
> +       (file-name (git-file-name name version))
> +       (sha256
> +        (base32
> +         "1n12i1rmn9cjn6p8yr6qn5dwbrwvym7ckr7bla04a1xnq8qlcyj7"))))
> +    (build-system dune-build-system)
> +    (arguments `(#:test-target "."))
> +    (propagated-inputs `(("ocaml-lwt" ,ocaml-lwt)))
> +    (properties `((upstream-name . "lwt_log")))
> +    (synopsis "OCaml/Lwt logging library (deprecated)")
> +    (description "This OCaml library provides helpers for logging is
> +deprecated for @code{ocaml-logs}.")

This sentence is a bit weird, maybe

  This OCaml library provides helpers for logging; it has been
  deprecated in favor of @code{ocaml-logs}.

> +    (license license:lgpl2.1)))

COPYING[1] say lgpgl2.1+, and “with the additional exemption that
compiling, linking, and/or using OpenSSL is allowed”.  You can probably
put a comment that mentions the exemption.

[1]: <https://github.com/ocsigen/lwt_log/blob/master/COPYING>