build: use SPDX license tags

The license folder is a core part of OpenWrt and all GPL-2.0 licensed.
Use SPDX license tags to allow machines to check licenses.

Signed-off-by: Paul Spooren <[email protected]>
[rebase, keep some Copyright lines, sharpen commit message]
Signed-off-by: Adrian Schmutzler <[email protected]>

BSDmakefile

@@ -1,7 +1,6 @@
-# Copyright (C) 2006 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
+# SPDX-License-Identifier: GPL-2.0-only
 #
+# Copyright (C) 2006 OpenWrt.org
+
 world ${.TARGETS}:
 	@gmake $@

Config.in

@@ -1,8 +1,6 @@
-# Copyright (C) 2006-2013 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
+# SPDX-License-Identifier: GPL-2.0-only
 #
+# Copyright (C) 2006-2013 OpenWrt.org
 
 mainmenu "OpenWrt Configuration"
 

Makefile

@@ -1,10 +1,6 @@
-# Makefile for OpenWrt
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Copyright (C) 2007 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
 
 TOPDIR:=${CURDIR}
 LC_ALL:=C

config/Config-build.in

@@ -1,9 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
 # Copyright (C) 2006-2013 OpenWrt.org
 # Copyright (C) 2016 LEDE Project
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
 
 config EXPERIMENTAL
 	bool "Enable experimental features by default"

config/Config-devel.in

@@ -1,8 +1,6 @@
-# Copyright (C) 2006-2013 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
+# SPDX-License-Identifier: GPL-2.0-only
 #
+# Copyright (C) 2006-2013 OpenWrt.org
 
 menuconfig DEVEL
 	bool "Advanced configuration options (for developers)"

config/Config-images.in

@@ -1,8 +1,6 @@
-# Copyright (C) 2006-2013 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
+# SPDX-License-Identifier: GPL-2.0-only
 #
+# Copyright (C) 2006-2013 OpenWrt.org
 
 menu "Target Images"
 

config/Config-kernel.in

@@ -1,8 +1,6 @@
-# Copyright (C) 2006-2014 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
+# SPDX-License-Identifier: GPL-2.0-only
 #
+# Copyright (C) 2006-2014 OpenWrt.org
 
 config KERNEL_BUILD_USER
 	string "Custom Kernel Build User Name"

include/autotools.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2007-2012 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2007-2020 OpenWrt.org
 
 autoconf_bool = $(patsubst %,$(if $($(1)),--enable,--disable)-%,$(2))
 

include/debug.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2007 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2007-2020 OpenWrt.org
 
 # debug flags:
 #

include/depends.mk

@@ -1,9 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2007 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2007-2020 OpenWrt.org
+
 # define a dependency on a subtree
 # parameters:
 #	1: directories/files

include/download.mk

@@ -1,10 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Copyright (C) 2006-2012 OpenWrt.org
 # Copyright (C) 2016 LEDE project
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
 
 PROJECT_GIT = https://git.openwrt.org
 

include/feeds.mk

@@ -1,10 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Copyright (C) 2014 OpenWrt.org
 # Copyright (C) 2016 LEDE Project
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
 
 -include $(TMP_DIR)/.packageauxvars
 

include/hardening.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2015 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2015-2020 OpenWrt.org
 
 PKG_CHECK_FORMAT_SECURITY ?= 1
 PKG_ASLR_PIE ?= 1

include/host-build.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2006-2010 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2006-2020 OpenWrt.org
 
 include $(INCLUDE_DIR)/download.mk
 

include/image.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2006-2010 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2006-2020 OpenWrt.org
 
 override TARGET_BUILD=
 include $(INCLUDE_DIR)/prereq.mk

include/kernel-build.mk

@@ -1,9 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2006-2007 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2006-2020 OpenWrt.org
+
 include $(INCLUDE_DIR)/prereq.mk
 include $(INCLUDE_DIR)/depends.mk
 

include/kernel-defaults.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2006-2015 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2006-2020 OpenWrt.org
 
 ifdef CONFIG_STRIP_KERNEL_EXPORTS
   KERNEL_MAKEOPTS += \

include/kernel-version.mk

@@ -1,5 +1,5 @@
-# Use the default kernel version if the Makefile doesn't override it
 
+# Use the default kernel version if the Makefile doesn't override it
 LINUX_RELEASE?=1
 
 ifdef CONFIG_TESTING_KERNEL

include/kernel.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2006-2015 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2006-2020 OpenWrt.org
 
 ifneq ($(filter check,$(MAKECMDGOALS)),)
 CHECK:=1

include/netfilter.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2006-2014 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2006-2020 OpenWrt.org
 
 ifneq ($(__inc_netfilter),1)
 __inc_netfilter:=1

include/nls.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2011-2012 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2011-2020 OpenWrt.org
 
 # iconv full
 ifeq ($(CONFIG_BUILD_NLS),y)

include/package-bin.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2007-2014 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2007-2020 OpenWrt.org
 
 ifeq ($(DUMP),)
   define BuildTarget/bin

include/package-defaults.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2006 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2006-2020 OpenWrt.org
 
 PKG_DEFAULT_DEPENDS = +libc +USE_GLIBC:librt +USE_GLIBC:libpthread
 

include/package-dumpinfo.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2006 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2006-2020 OpenWrt.org
 
 ifneq ($(DUMP),)
 

include/package-ipkg.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2006-2014 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2006-2020 OpenWrt.org
 
 ifndef DUMP
   include $(INCLUDE_DIR)/feeds.mk

include/package-seccomp.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2015 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2015-2020 OpenWrt.org
 
 PKG_CONFIG_DEPENDS+= CONFIG_KERNEL_SECCOMP
 

include/package.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2006-2008 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2006-2020 OpenWrt.org
 
 __package_mk:=1
 

include/prereq-build.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2006-2012 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2006-2020 OpenWrt.org
 
 include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/prereq.mk

include/prereq.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2006-2015 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2006-2020 OpenWrt.org
 
 ifneq ($(__prereq_inc),1)
 __prereq_inc:=1

include/quilt.mk

@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2007-2009 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
+# Copyright (C) 2007-2020 OpenWrt.org
 
 ifeq ($(TARGET_BUILD),1)
   PKG_BUILD_DIR:=$(LINUX_DIR)

include/subdir.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2007 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2007-2020 OpenWrt.org
 
 ifeq ($(MAKECMDGOALS),prereq)
   SUBTARGETS:=prereq

include/target.mk

@@ -1,10 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Copyright (C) 2007-2008 OpenWrt.org
 # Copyright (C) 2016 LEDE Project
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
 
 ifneq ($(__target_inc),1)
 __target_inc=1

include/toolchain-build.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2009 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2009-2020 OpenWrt.org
 
 override CONFIG_AUTOREBUILD=
 override CONFIG_AUTOREMOVE=

include/toplevel.mk

@@ -1,10 +1,6 @@
-# Makefile for OpenWrt
-#
-# Copyright (C) 2007-2012 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
+# SPDX-License-Identifier: GPL-2.0-only
 #
+# Copyright (C) 2007-2020 OpenWrt.org
 
 PREP_MK= OPENWRT_BUILD= QUIET=0
 

include/unpack.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2006-2007 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2006-2020 OpenWrt.org
 
 HOST_TAR:=$(TAR)
 TAR_CMD=$(HOST_TAR) -C $(1)/.. $(TAR_OPTIONS)

include/verbose.mk

@@ -1,9 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
-# Copyright (C) 2006 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
+# Copyright (C) 2006-2020 OpenWrt.org
 
 ifndef OPENWRT_VERBOSE
   OPENWRT_VERBOSE:=

include/version.mk

@@ -1,10 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Copyright (C) 2012-2015 OpenWrt.org
 # Copyright (C) 2016 LEDE Project
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
 
 # Substituted by SDK, do not remove
 # REVISION:=x

rules.mk

@@ -1,10 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Copyright (C) 2006-2010 OpenWrt.org
 # Copyright (C) 2016 LEDE Project
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
 
 ifneq ($(__rules_inc),1)
 __rules_inc=1