[grilo/wip/hadess/confirm-license] build: Clarify LGPLv2.1 or later license

[Bastien Nocera <hadess src gnome org>]

commit 89537b8c4bae8857078de5d084f79ffe532a7ba8
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Jun 21 14:16:37 2021 +0200

    build: Clarify LGPLv2.1 or later license
    
    The COPYING file by itself isn't enough to know under which license the
    project is released, as a combined work.
    
    Clarify this in the build system and the README.

 README.md              | 5 +++++
 doc/grilo/overview.xml | 3 ++-
 meson.build            | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/README.md b/README.md
index c6fe38e1..16f94538 100644
--- a/README.md
+++ b/README.md
@@ -89,4 +89,9 @@ ninja -C build
 ./build/tools/grilo-test-ui/grilo-test-ui-0.3
 ```
 
+## License
+
+grilo is available under the [GNU Lesser General Public License v2.1 or 
later](https://spdx.org/licenses/LGPL-2.1-or-later.html).
+Check the sources themselves for individual copyrights and licenses.
+
 Enjoy!
diff --git a/doc/grilo/overview.xml b/doc/grilo/overview.xml
index aa169ae8..52b8e41b 100644
--- a/doc/grilo/overview.xml
+++ b/doc/grilo/overview.xml
@@ -99,7 +99,8 @@ developers.
 </para>
 
 <para>
-Grilo is licensed under the GNU Lesser General Public License (LGPL).
+Grilo is licensed under the GNU Lesser General Public License (LGPL)
+version 2.1 or later.
 </para>
 
 </section>
diff --git a/meson.build b/meson.build
index cf12454c..f76d790a 100644
--- a/meson.build
+++ b/meson.build
@@ -12,7 +12,7 @@ project('grilo', 'c',
             'c_std=gnu99',
             'warning_level=1'
         ],
-        license: 'LGPL 2.1',
+        license: 'LGPL-2.1-or-later',
         meson_version: '>= 0.46.0')
 
 grilo_version = meson.project_version()