kconfig: convert to SPDX License Identifier

All files in lxdialog/ are licensed under GPL-2.0+, and the rest are
under GPL-2.0. I added GPL-2.0 tags to test scripts in tests/.

Documentation/process/license-rules.rst does not suggest anything
about the flex/bison files. Because flex does not accept the C++
comment style at the very top of a file, I used the C style for
zconf.l, and so for zconf.y for consistency.

Signed-off-by: Masahiro Yamada <[e-mail]>

scripts/kconfig/conf.c

···
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2002 Roman Zippel <[e-mail]>
- * Released under the terms of the GNU GPL v2.0.
  */
 
 #include <ctype.h>

scripts/kconfig/confdata.c

···
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2002 Roman Zippel <[e-mail]>
- * Released under the terms of the GNU GPL v2.0.
  */
 
 #include <sys/stat.h>

scripts/kconfig/expr.c

···
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2002 Roman Zippel <[e-mail]>
- * Released under the terms of the GNU GPL v2.0.
  */
 
 #include <stdio.h>

scripts/kconfig/expr.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (C) 2002 Roman Zippel <[e-mail]>
- * Released under the terms of the GNU GPL v2.0.
  */
 
 #ifndef EXPR_H

scripts/kconfig/gconf.c

···
-/* Hey EMACS -*- linux-c -*- */
+// SPDX-License-Identifier: GPL-2.0
 /*
- *
  * Copyright (C) 2002-2003 Romain Lievin <[e-mail]>
- * Released under the terms of the GNU GPL v2.0.
- *
  */
 
 #ifdef HAVE_CONFIG_H

scripts/kconfig/images.c

···
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2002 Roman Zippel <[e-mail]>
- * Released under the terms of the GNU GPL v2.0.
  */
 
 static const char *xpm_load[] = {

scripts/kconfig/lkc.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (C) 2002 Roman Zippel <[e-mail]>
- * Released under the terms of the GNU GPL v2.0.
  */
 
 #ifndef LKC_H

scripts/kconfig/lxdialog/checklist.c

···
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  checklist.c -- implements the checklist box
  *
···
  *     Stuart Herbert - [e-mail]: radiolist extension
  *     Alessandro Rubini - [e-mail]: merged the two
  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap ([e-mail])
- *
- *  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, write to the Free Software
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include "dialog.h"

scripts/kconfig/lxdialog/dialog.h

···
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  dialog.h -- common declarations for all dialog modules
  *
  *  AUTHOR: Savio Lam ([e-mail])
- *
- *  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, write to the Free Software
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include <sys/types.h>

scripts/kconfig/lxdialog/inputbox.c

···
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  inputbox.c -- implements the input box
  *
  *  ORIGINAL AUTHOR: Savio Lam ([e-mail])
  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap ([e-mail])
- *
- *  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, write to the Free Software
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include "dialog.h"

scripts/kconfig/lxdialog/menubox.c

···
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  menubox.c -- implements the menu box
  *
  *  ORIGINAL AUTHOR: Savio Lam ([e-mail])
  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap ([e-mail])
- *
- *  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, write to the Free Software
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 /*

scripts/kconfig/lxdialog/textbox.c

···
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  textbox.c -- implements the text box
  *
  *  ORIGINAL AUTHOR: Savio Lam ([e-mail])
  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap ([e-mail])
- *
- *  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, write to the Free Software
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include "dialog.h"

scripts/kconfig/lxdialog/util.c

···
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  util.c
  *
  *  ORIGINAL AUTHOR: Savio Lam ([e-mail])
  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap ([e-mail])
- *
- *  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, write to the Free Software
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include <stdarg.h>

scripts/kconfig/lxdialog/yesno.c

···
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  yesno.c -- implements the yes/no box
  *
  *  ORIGINAL AUTHOR: Savio Lam ([e-mail])
  *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap ([e-mail])
- *
- *  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, write to the Free Software
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include "dialog.h"

scripts/kconfig/mconf.c

···
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2002 Roman Zippel <[e-mail]>
- * Released under the terms of the GNU GPL v2.0.
  *
  * Introduced single menu mode (show all sub-menus in one large tree).
  * 2002-11-06 Petr Baudis <[e-mail]>

scripts/kconfig/menu.c

···
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2002 Roman Zippel <[e-mail]>
- * Released under the terms of the GNU GPL v2.0.
  */
 
 #include <ctype.h>

scripts/kconfig/merge_config.sh

···
 #!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
 #  merge_config.sh - Takes a list of config fragment values, and merges
 #  them one by one. Provides warnings on overridden values, and specified
 #  values that did not make it to the resulting .config file (due to missed
···
 #
 #  Copyright (c) 2009-2010 Wind River Systems, Inc.
 #  Copyright 2011 Linaro
-#
-#  This program is free software; you can redistribute it and/or modify
-#  it under the terms of the GNU General Public License version 2 as
-#  published by the Free Software Foundation.
-#
-#  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.
 
 clean_up() {
 	rm -f $TMP_FILE

scripts/kconfig/nconf.c

···
+// SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (C) 2008 Nir Tzachar <[e-mail]?
- * Released under the terms of the GNU GPL v2.0.
+ * Copyright (C) 2008 Nir Tzachar <[e-mail]>
  *
  * Derived from menuconfig.
- *
  */
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE

scripts/kconfig/nconf.gui.c

···
+// SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (C) 2008 Nir Tzachar <[e-mail]?
- * Released under the terms of the GNU GPL v2.0.
+ * Copyright (C) 2008 Nir Tzachar <[e-mail]>
  *
  * Derived from menuconfig.
- *
  */
 #include "nconf.h"
 #include "lkc.h"

scripts/kconfig/nconf.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
- * Copyright (C) 2008 Nir Tzachar <[e-mail]?
- * Released under the terms of the GNU GPL v2.0.
+ * Copyright (C) 2008 Nir Tzachar <[e-mail]>
  *
  * Derived from menuconfig.
- *
  */
 
 #include <ctype.h>

scripts/kconfig/qconf.cc

···
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2002 Roman Zippel <[e-mail]>
  * Copyright (C) 2015 Boris Barbulovski <[e-mail]>
- * Released under the terms of the GNU GPL v2.0.
  */
 
 #include <qglobal.h>

scripts/kconfig/qconf.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (C) 2002 Roman Zippel <[e-mail]>
- * Released under the terms of the GNU GPL v2.0.
  */
 
 #include <QTextBrowser>

scripts/kconfig/streamline_config.pl

···
 #!/usr/bin/env perl
+# SPDX-License-Identifier: GPL-2.0
 #
 # Copyright 2005-2009 - Steven Rostedt
-# Licensed under the terms of the GNU GPL License version 2
 #
 #  It's simple enough to figure out how this works.
 #  If not, then you can ask me at [e-mail]

scripts/kconfig/symbol.c

···
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2002 Roman Zippel <[e-mail]>
- * Released under the terms of the GNU GPL v2.0.
  */
 
 #include <ctype.h>

scripts/kconfig/tests/auto_submenu/Kconfig

···
+# SPDX-License-Identifier: GPL-2.0
+
 config A
 	bool "A"
 	default y

scripts/kconfig/tests/auto_submenu/__init__.py

···
+# SPDX-License-Identifier: GPL-2.0
 """
 Create submenu for symbols that depend on the preceding one.
 

scripts/kconfig/tests/choice/Kconfig

···
+# SPDX-License-Identifier: GPL-2.0
+
 config MODULES
 	bool "Enable loadable module support"
 	option modules

scripts/kconfig/tests/choice/__init__.py

···
+# SPDX-License-Identifier: GPL-2.0
 """
 Basic choice tests.
 

scripts/kconfig/tests/choice_value_with_m_dep/Kconfig

···
+# SPDX-License-Identifier: GPL-2.0
+
 config MODULES
 	def_bool y
 	option modules

scripts/kconfig/tests/choice_value_with_m_dep/__init__.py

···
+# SPDX-License-Identifier: GPL-2.0
 """
 Hide tristate choice values with mod dependency in y choice.
 

scripts/kconfig/tests/err_recursive_inc/__init__.py

···
+# SPDX-License-Identifier: GPL-2.0
 """
 Detect recursive inclusion error.
 

scripts/kconfig/tests/inter_choice/Kconfig

···
+# SPDX-License-Identifier: GPL-2.0
+
 config MODULES
 	def_bool y
 	option modules

scripts/kconfig/tests/inter_choice/__init__.py

···
+# SPDX-License-Identifier: GPL-2.0
 """
 Do not affect user-assigned choice value by another choice.
 

scripts/kconfig/tests/new_choice_with_dep/Kconfig

···
+# SPDX-License-Identifier: GPL-2.0
+
 config A
 	bool "A"
 	help

scripts/kconfig/tests/new_choice_with_dep/__init__.py

···
+# SPDX-License-Identifier: GPL-2.0
 """
 Ask new choice values when they become visible.
 

scripts/kconfig/tests/no_write_if_dep_unmet/Kconfig

···
+# SPDX-License-Identifier: GPL-2.0
+
 config A
 	bool "A"
 

scripts/kconfig/tests/no_write_if_dep_unmet/__init__.py

···
+# SPDX-License-Identifier: GPL-2.0
 """
 Do not write choice values to .config if the dependency is unmet.
 

scripts/kconfig/tests/rand_nested_choice/Kconfig

···
+# SPDX-License-Identifier: GPL-2.0
+
 choice
 	prompt "choice"
 

scripts/kconfig/tests/rand_nested_choice/__init__.py

···
+# SPDX-License-Identifier: GPL-2.0
 """
 Set random values recursively in nested choices.
 

scripts/kconfig/util.c

···
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2002-2005 Roman Zippel <[e-mail]>
  * Copyright (C) 2002-2005 Sam Ravnborg <[e-mail]>
- *
- * Released under the terms of the GNU GPL v2.0.
  */
 
 #include <stdarg.h>

scripts/kconfig/zconf.l

···
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2002 Roman Zippel <[e-mail]>
+ */
 %option nostdinit noyywrap never-interactive full ecs
 %option 8bit nodefault yylineno
 %x ASSIGN_VAL HELP STRING
 %{
-/*
- * Copyright (C) 2002 Roman Zippel <[e-mail]>
- * Released under the terms of the GNU GPL v2.0.
- */
 
 #include <assert.h>
 #include <limits.h>

scripts/kconfig/zconf.y

···
-%{
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (C) 2002 Roman Zippel <[e-mail]>
- * Released under the terms of the GNU GPL v2.0.
  */
+%{
 
 #include <ctype.h>
 #include <stdarg.h>