pprint.m4: add missing copyright header

Add the missing copyright header to pprint.m4, clarifying that it is
GPLv2+ with the special exception applying to Autoconf Macros.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
CC: Philippe Proulx <pproulx@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>

diff --git a/m4/pprint.m4 b/m4/pprint.m4
index a7cfd94c18b5fe2053855f5189a35735e612136f..a18a2ac6bf73bcc6bf42730eb9c08344cc2e25f8 100644 (file)
--- a/m4/pprint.m4
+++ b/m4/pprint.m4
@@ -1,6 +1,36 @@
-# Pretty printing macros.
+# DESCRIPTION
 #
-# Author: Philippe Proulx <pproulx@efficios.com>
+#   Pretty printing macros.
+#
+# LICENSE
+#
+#   Copyright (c) 2016 Philippe Proulx <pproulx@efficios.com>
+#
+#   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
+#   Free Software Foundation; either version 2 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <https://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
 
 #serial 1