Re: [ptxdist] [PATCH v2 1/3] libmodbus3: correct license

[Michael Olbrich <m.olbrich@pengutronix.de>]

On Thu, May 28, 2020 at 11:04:24AM +0200, Bastian Krause wrote:
> libmodbus reverted its license with v3.0.0, commit 1275387 ("Revert
> libmodbus licence from LGPLv3 to LGPLv2.1") to LGPL-2.1-or-later.
> 820e15f ("SPDX: change LGPL-2.1+ to LGPL-2.1-or-later") updates the SPDX
> identifier in file headers to the recent version.
> The README.md states "or later" part of the license, so add that to
> LIBMODBUS3_LICENSE_FILES.
> 
> The tests are licensed under BSD-3-Clause since v3.1.2, commit bdd5379
> ("Switch test programs to a BSD license").
> 
> Signed-off-by: Bastian Krause <bst@pengutronix.de>
> ---
> Changes since (implicit) v1:
> - add " AND BSD-3-Clause" to license since the tests are licensed under
>   BSD-3-Clause
> - add LIBMODBUS3_LICENSE_FILES
> ---
>  rules/libmodbus3.make | 21 ++++++++++++---------
>  1 file changed, 12 insertions(+), 9 deletions(-)
> 
> diff --git a/rules/libmodbus3.make b/rules/libmodbus3.make
> index f206ec4aa..06721aa05 100644
> --- a/rules/libmodbus3.make
> +++ b/rules/libmodbus3.make
> @@ -14,15 +14,18 @@ PACKAGES-$(PTXCONF_LIBMODBUS3) += libmodbus3
>  #
>  # Paths and names
>  #
> -LIBMODBUS3_VERSION	:= 3.1.4
> -LIBMODBUS3_MD5		:= b1a8fd3a40d2db4de51fb0cbcb201806
> -LIBMODBUS3		:= libmodbus-$(LIBMODBUS3_VERSION)
> -LIBMODBUS3_SUFFIX	:= tar.gz
> -LIBMODBUS3_URL		:= http://libmodbus.org/site_media/build/$(LIBMODBUS3).$(LIBMODBUS3_SUFFIX)
> -LIBMODBUS3_SOURCE	:= $(SRCDIR)/$(LIBMODBUS3).$(LIBMODBUS3_SUFFIX)
> -LIBMODBUS3_DIR		:= $(BUILDDIR)/$(LIBMODBUS3)
> -LIBMODBUS3_LICENSE	:= LGPL-3.0-only
> -
> +LIBMODBUS3_VERSION		:= 3.1.4
> +LIBMODBUS3_MD5			:= b1a8fd3a40d2db4de51fb0cbcb201806
> +LIBMODBUS3			:= libmodbus-$(LIBMODBUS3_VERSION)
> +LIBMODBUS3_SUFFIX		:= tar.gz
> +LIBMODBUS3_URL			:= http://libmodbus.org/site_media/build/$(LIBMODBUS3).$(LIBMODBUS3_SUFFIX)
> +LIBMODBUS3_SOURCE		:= $(SRCDIR)/$(LIBMODBUS3).$(LIBMODBUS3_SUFFIX)
> +LIBMODBUS3_DIR			:= $(BUILDDIR)/$(LIBMODBUS3)
> +LIBMODBUS3_LICENSE		:= LGPL-2.1-or-later AND BSD-3-Clause
> +LIBMODBUS3_LICENSE_FILES	:= \
> +	file://COPYING.LESSER;md5=4fbd65380cdd255951079008b364516c \
> +	file://README.md;startline=17;endline=17;md5=c0937f6beb7c75412b9259e48222e077 \

I don't think this line adds anything. The source files make the 'or-later'
clear and we don't have anything like this for any other package.

> +	file://tests/version.c;startline=4;endline=4;md5=b23faac1da952fa6845fd4fb63a20ffe

This is not sufficient. For BSD style licenses the copyright line is
relevant and must be added.
And we need the license text which is missing :-/.

The BSD-3-Clause license states:
"Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer."

The license is in the git repo but not the release tarball :-/. I've
reported this upstream[1].

Michael

[1] https://github.com/stephane/libmodbus/issues/542

>  # ----------------------------------------------------------------------------
>  # Prepare
>  # ----------------------------------------------------------------------------
> -- 
> 2.26.2
> 
> 
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