lgpl: Update all files to LGPLv3+

Wherever applicable files received an SPDX license identifier. Then,
this commit removes the GPL license files and consolidates all license
matters under the new LGPLv3+ license.

Signed-off-by: Johannes Demel <[email protected]>

.github/workflows/android_build.yml

@@ -1,3 +1,11 @@
+#
+# Copyright 2022 Free Software Foundation, Inc.
+#
+# This file is part of VOLK
+#
+# SPDX-License-Identifier: LGPL-3.0-or-later
+#
+
 name: Build on Android NDK
 
 on: [push, pull_request]

.github/workflows/check-pr-formatting.yml

@@ -1,3 +1,11 @@
+#
+# Copyright 2020, 2022 Free Software Foundation, Inc.
+#
+# This file is part of VOLK
+#
+# SPDX-License-Identifier: LGPL-3.0-or-later
+#
+
 name: Check PR Formatting
 
 on:

.github/workflows/run-tests.yml

@@ -1,3 +1,11 @@
+#
+# Copyright 2020 - 2022 Free Software Foundation, Inc.
+#
+# This file is part of VOLK
+#
+# SPDX-License-Identifier: LGPL-3.0-or-later
+#
+
 name: Run VOLK tests
 
 on: [push, pull_request]

.gitlab-ci.yml

@@ -1,3 +1,11 @@
+#
+# Copyright 2018 - 2020, 2022 Free Software Foundation, Inc.
+#
+# This file is part of VOLK
+#
+# SPDX-License-Identifier: LGPL-3.0-or-later
+#
+
 # This file is a template, and might need editing before it works on your project.
 # use the official gcc image, based on debian
 # can use versions as well, like gcc:5.2

.travis.yml

@@ -1,3 +1,10 @@
+#
+# Copyright 2018 - 2022 Free Software Foundation, Inc.
+#
+# This file is part of VOLK
+#
+# SPDX-License-Identifier: LGPL-3.0-or-later
+#
 language: cpp
 
 os: linux

README.md

@@ -111,13 +111,22 @@ We want to make sure VOLK compiles on a wide variety of compilers. Thus, we targ
 
 ## License
 
-VOLK is migrating from the GNU General Public License v3.0 or later (GPL-3.0-or-later)
-to the GNU Lesser General Public License v3.0 or later (LGPL-3.0-or-later).
-At this point in time, much of the code in the repository is still GPL-licensed.
-New contributors are required to use the LGPLv3+ for their code contributions.
-Existing contributors are very kindly requested to re-submit their GPL-3.0-or-later license code contributions to LGPL-3.0-or-later by
-adding their name, GitHub handle, and email address(es) used for VOLK commits
+**VOLK 3.0 and later are licensed under the GNU Lesser General Public License v3.0 or later (LGPL-3.0-or-later).**
+
+### Previous VOLK version license
+
+Earlier versions of VOLK (before VOLK 3.0) were licensed under the GNU General Public License v3.0 or later (GPL-3.0-or-later).
+Since then, VOLK migrated to the LGPL-3.0-or-later.
+
+Being technical: There are 3 people left (out of 74) who we haven't been able to get in contact with (at all), for a total of 4 (out of 1092) commits, 13 (of 282822) additions, and 7 (of 170421) deletions. We have reviewed these commits and all are simple, trivial changes (e.g., 1 line change) and most are no longer relevant (e.g., to a file that no longer exists). Volk maintainers (@michaelld and @jdemel) are in agreement that the combination -- small numbers of changes per committer, simple changes per commit, commits no longer relevant -- means that we can proceed with relicensing without the approval of the folks. We will try reaching out periodically to these folks, but we believe it unlikely we will get a reply.
+We kindly request them to re-submit their GPL-3.0-or-later license code contributions to LGPL-3.0-or-later by adding their name, GitHub handle, and email address(es) used for VOLK commits
 to the file [AUTHORS_RESUBMITTING_UNDER_LGPL_LICENSE.md](docs/AUTHORS_RESUBMITTING_UNDER_LGPL_LICENSE.md).
 
-### Re-licensing status
-VOLK is ready for a VOLK 3.0 release which marks our final switch to LGPL.
+### Legal Matters
+
+Some files have been changed many times throughout the years. Copyright
+notices at the top of source files list which years changes have been
+made. For some files, changes have occurred in many consecutive years.
+These files may often have the format of a year range (e.g., "2006 - 2011"),
+which indicates that these files have had copyrightable changes made
+during each year in the range, inclusive.

apps/plot_best_vs_generic.py

@@ -3,7 +3,7 @@
 #
 # This file is part of VOLK
 #
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: LGPL-3.0-or-later
 #
 
 # This script is used to compare the generic kernels to the highest performing kernel, for each operation

apps/volk-config-info.cc

@@ -4,7 +4,7 @@
  *
  * This file is part of VOLK
  *
- * SPDX-License-Identifier: GPL-3.0-or-later
+ * SPDX-License-Identifier: LGPL-3.0-or-later
  */
 
 #if HAVE_CONFIG_H

apps/volk_option_helpers.cc

@@ -4,7 +4,7 @@
  *
  * This file is part of VOLK
  *
- * SPDX-License-Identifier: GPL-3.0-or-later
+ * SPDX-License-Identifier: LGPL-3.0-or-later
  */
 
 

apps/volk_option_helpers.h

@@ -4,7 +4,7 @@
  *
  * This file is part of VOLK
  *
- * SPDX-License-Identifier: GPL-3.0-or-later
+ * SPDX-License-Identifier: LGPL-3.0-or-later
  */
 
 #ifndef VOLK_VOLK_OPTION_HELPERS_H

apps/volk_profile.cc

@@ -4,7 +4,7 @@
  *
  * This file is part of VOLK
  *
- * SPDX-License-Identifier: GPL-3.0-or-later
+ * SPDX-License-Identifier: LGPL-3.0-or-later
  */
 
 #if HAS_STD_FILESYSTEM_EXPERIMENTAL

apps/volk_profile.h

@@ -4,7 +4,7 @@
  *
  * This file is part of VOLK
  *
- * SPDX-License-Identifier: GPL-3.0-or-later
+ * SPDX-License-Identifier: LGPL-3.0-or-later
  */
 
 #include <stdbool.h> // for bool

appveyor.yml

@@ -1,3 +1,10 @@
+#
+# Copyright 2016, 2017, 2019, 2020, 2022 Free Software Foundation, Inc.
+#
+# This file is part of VOLK
+#
+# SPDX-License-Identifier: LGPL-3.0-or-later
+#
 clone_depth: 1
 image: Visual Studio 2019
 cache:

cmake/Modules/CMakeParseArgumentsCopy.cmake

@@ -2,7 +2,7 @@
 #
 # This file is part of VOLK.
 #
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: LGPL-3.0-or-later
 #
 
 # CMAKE_PARSE_ARGUMENTS(<prefix> <options> <one_value_keywords> <multi_value_keywords> args...)

cmake/Modules/FindFILESYSTEM.cmake

@@ -2,7 +2,7 @@
 #
 # This file is part of VOLK.
 #
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: LGPL-3.0-or-later
 #
 
 # Original code from https://github.com/vector-of-bool/CMakeCM and modified

cmake/Modules/FindORC.cmake

@@ -2,7 +2,7 @@
 #
 # This file is part of VOLK.
 #
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: LGPL-3.0-or-later
 #
 
 FIND_PACKAGE(PkgConfig)

cmake/Modules/VolkAddTest.cmake

@@ -2,7 +2,7 @@
 #
 # This file is part of VOLK.
 #
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: LGPL-3.0-or-later
 #
 
 if(DEFINED __INCLUDED_VOLK_ADD_TEST)

cmake/Modules/VolkBuildTypes.cmake

@@ -2,7 +2,7 @@
 #
 # This file is part of VOLK
 #
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: LGPL-3.0-or-later
 #
 
 if(DEFINED __INCLUDED_VOLK_BUILD_TYPES_CMAKE)

cmake/Modules/VolkPython.cmake

@@ -2,7 +2,7 @@
 #
 # This file is part of VOLK.
 #
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: LGPL-3.0-or-later
 #
 
 if(DEFINED __INCLUDED_VOLK_PYTHON_CMAKE)

cmake/Modules/VolkVersion.cmake

@@ -2,7 +2,7 @@
 #
 # This file is part of VOLK.
 #
-# SPDX-License-Identifier: GPL-3.0-or-later
+# SPDX-License-Identifier: LGPL-3.0-or-later
 #
 
 if(DEFINED __INCLUDED_VOLK_VERSION_CMAKE)