Add SPDX license id lines to those .m4 files that mention a license

frontends_extra/cpp/m4/ax_cxx_compile_stdcxx_11.m4

@@ -27,6 +27,7 @@
 #   Copyright (c) 2008 Benjamin Kosnik <[email protected]>
 #   Copyright (c) 2012 Zack Weinberg <[email protected]>
 #   Copyright (c) 2013 Roy Stogner <[email protected]>
+#   SPDX-License-Identifier: FSFAP
 #
 #   Copying and distribution of this file, with or without modification, are
 #   permitted in any medium without royalty provided the copyright notice

frontends_extra/cpp/m4/ax_pthread.m4

@@ -55,6 +55,7 @@
 #
 #   Copyright (c) 2008 Steven G. Johnson <[email protected]>
 #   Copyright (c) 2011 Daniel Richard G. <[email protected]>
+#   SPDX-License-Identifier: GPL-3.0-or-later
 #
 #   This program is free software: you can redistribute it and/or modify it
 #   under the terms of the GNU General Public License as published by the

m4/ax_cxx_compile_stdcxx_11.m4

@@ -27,6 +27,7 @@
 #   Copyright (c) 2008 Benjamin Kosnik <[email protected]>
 #   Copyright (c) 2012 Zack Weinberg <[email protected]>
 #   Copyright (c) 2013 Roy Stogner <[email protected]>
+#   SPDX-License-Identifier: FSFAP
 #
 #   Copying and distribution of this file, with or without modification, are
 #   permitted in any medium without royalty provided the copyright notice

m4/ax_prog_doxygen.m4

@@ -91,6 +91,7 @@
 #
 #   Copyright (c) 2009 Oren Ben-Kiki <[email protected]>
 #   Copyright (c) 2015 Olaf Mandel <[email protected]>
+#   SPDX-License-Identifier: FSFAP
 #
 #   Copying and distribution of this file, with or without modification, are
 #   permitted in any medium without royalty provided the copyright notice

m4/ax_pthread.m4

@@ -55,6 +55,7 @@
 #
 #   Copyright (c) 2008 Steven G. Johnson <[email protected]>
 #   Copyright (c) 2011 Daniel Richard G. <[email protected]>
+#   SPDX-License-Identifier: GPL-3.0-or-later
 #
 #   This program is free software: you can redistribute it and/or modify it
 #   under the terms of the GNU General Public License as published by the

proto/m4/ax_boost_base.m4

@@ -27,6 +27,7 @@
 #
 #   Copyright (c) 2008 Thomas Porschberg <[email protected]>
 #   Copyright (c) 2009 Peter Adolphs
+#   SPDX-License-Identifier: FSFAP
 #
 #   Copying and distribution of this file, with or without modification, are
 #   permitted in any medium without royalty provided the copyright notice

proto/m4/ax_boost_system.m4

@@ -25,6 +25,7 @@
 #   Copyright (c) 2008 Thomas Porschberg <[email protected]>
 #   Copyright (c) 2008 Michael Tindal
 #   Copyright (c) 2008 Daniel Casimiro <[email protected]>
+#   SPDX-License-Identifier: FSFAP
 #
 #   Copying and distribution of this file, with or without modification, are
 #   permitted in any medium without royalty provided the copyright notice

proto/m4/ax_boost_thread.m4

@@ -24,6 +24,7 @@
 #
 #   Copyright (c) 2009 Thomas Porschberg <[email protected]>
 #   Copyright (c) 2009 Michael Tindal
+#   SPDX-License-Identifier: FSFAP
 #
 #   Copying and distribution of this file, with or without modification, are
 #   permitted in any medium without royalty provided the copyright notice

proto/m4/ax_compare_version.m4

@@ -73,6 +73,7 @@
 # LICENSE
 #
 #   Copyright (c) 2008 Tim Toolan <[email protected]>
+#   SPDX-License-Identifier: FSFAP
 #
 #   Copying and distribution of this file, with or without modification, are
 #   permitted in any medium without royalty provided the copyright notice

proto/m4/ax_cxx_compile_stdcxx_11.m4

@@ -27,6 +27,7 @@
 #   Copyright (c) 2008 Benjamin Kosnik <[email protected]>
 #   Copyright (c) 2012 Zack Weinberg <[email protected]>
 #   Copyright (c) 2013 Roy Stogner <[email protected]>
+#   SPDX-License-Identifier: FSFAP
 #
 #   Copying and distribution of this file, with or without modification, are
 #   permitted in any medium without royalty provided the copyright notice

proto/m4/ax_pthread.m4

@@ -55,6 +55,7 @@
 #
 #   Copyright (c) 2008 Steven G. Johnson <[email protected]>
 #   Copyright (c) 2011 Daniel Richard G. <[email protected]>
+#   SPDX-License-Identifier: GPL-3.0-or-later
 #
 #   This program is free software: you can redistribute it and/or modify it
 #   under the terms of the GNU General Public License as published by the

proto/m4/pkg.m4

@@ -3,6 +3,7 @@ dnl serial 11 (pkg-config-0.29.1)
 dnl
 dnl Copyright © 2004 Scott James Remnant <[email protected]>.
 dnl Copyright © 2012-2015 Dan Nicholson <[email protected]>
+dnl SPDX-License-Identifier: GPL-2.0-or-later
 dnl
 dnl This program is free software; you can redistribute it and/or modify
 dnl it under the terms of the GNU General Public License as published by

targets/bmv2/m4/ax_cxx_compile_stdcxx_11.m4

@@ -27,6 +27,7 @@
 #   Copyright (c) 2008 Benjamin Kosnik <[email protected]>
 #   Copyright (c) 2012 Zack Weinberg <[email protected]>
 #   Copyright (c) 2013 Roy Stogner <[email protected]>
+#   SPDX-License-Identifier: FSFAP
 #
 #   Copying and distribution of this file, with or without modification, are
 #   permitted in any medium without royalty provided the copyright notice

targets/bmv2/m4/ax_prefix_config_h.m4

@@ -87,6 +87,7 @@
 #   Copyright (c) 2008 Guido U. Draheim <[email protected]>
 #   Copyright (c) 2008 Marten Svantesson
 #   Copyright (c) 2008 Gerald Point <[email protected]>
+#   SPDX-License-Identifier: GPL-3.0-or-later
 #
 #   This program is free software; you can redistribute it and/or modify it
 #   under the terms of the GNU General Public License as published by the

targets/bmv2/m4/ax_pthread.m4

@@ -55,6 +55,7 @@
 #
 #   Copyright (c) 2008 Steven G. Johnson <[email protected]>
 #   Copyright (c) 2011 Daniel Richard G. <[email protected]>
+#   SPDX-License-Identifier: GPL-3.0-or-later
 #
 #   This program is free software: you can redistribute it and/or modify it
 #   under the terms of the GNU General Public License as published by the