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linux/scripts/kconfig/Makefile
Greg Kroah-Hartman b24413180f License cleanup: add SPDX GPL-2.0 license identifier to files with no license 
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier.  The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
 - file had no licensing information it it.
 - file was a */uapi/* one with no licensing information in it,
 - file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne.  Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed.  Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
 - Files considered eligible had to be source code files.
 - Make and config files were included as candidates if they contained >5
   lines of source
 - File already had some variant of a license header in it (even if <5
   lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

 - when both scanners couldn't find any license traces, file was
   considered to have no license information in it, and the top level
   COPYING file license applied.

   For non */uapi/* files that summary was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0                                              11139

   and resulted in the first patch in this series.

   If that file was a */uapi/* path one, it was "GPL-2.0 WITH
   Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0 WITH Linux-syscall-note                        930

   and resulted in the second patch in this series.

 - if a file had some form of licensing information in it, and was one
   of the */uapi/* ones, it was denoted with the Linux-syscall-note if
   any GPL family license was found in the file or had no licensing in
   it (per prior point).  Results summary:

   SPDX license identifier                            # files
   ---------------------------------------------------|------
   GPL-2.0 WITH Linux-syscall-note                       270
   GPL-2.0+ WITH Linux-syscall-note                      169
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
   LGPL-2.1+ WITH Linux-syscall-note                      15
   GPL-1.0+ WITH Linux-syscall-note                       14
   ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
   LGPL-2.0+ WITH Linux-syscall-note                       4
   LGPL-2.1 WITH Linux-syscall-note                        3
   ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
   ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1

   and that resulted in the third patch in this series.

 - when the two scanners agreed on the detected license(s), that became
   the concluded license(s).

 - when there was disagreement between the two scanners (one detected a
   license but the other didn't, or they both detected different
   licenses) a manual inspection of the file occurred.

 - In most cases a manual inspection of the information in the file
   resulted in a clear resolution of the license that should apply (and
   which scanner probably needed to revisit its heuristics).

 - When it was not immediately clear, the license identifier was
   confirmed with lawyers working with the Linux Foundation.

 - If there was any question as to the appropriate license identifier,
   the file was flagged for further research and to be revisited later
   in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights.  The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
 - a full scancode scan run, collecting the matched texts, detected
   license ids and scores
 - reviewing anything where there was a license detected (about 500+
   files) to ensure that the applied SPDX license was correct
 - reviewing anything where there was no detection but the patch license
   was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
   SPDX license was correct

This produced a worksheet with 20 files needing minor correction.  This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg.  Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected.  This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.)  Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:10:55 +01:00

298 lines
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Makefile
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# SPDX-License-Identifier: GPL-2.0
# ===========================================================================
# Kernel configuration targets
# These targets are used from top-level makefile
PHONY += xconfig gconfig menuconfig config silentoldconfig update-po-config \
localmodconfig localyesconfig
ifdef KBUILD_KCONFIG
Kconfig := $(KBUILD_KCONFIG)
else
Kconfig := Kconfig
endif
ifeq ($(quiet),silent_)
silent := -s
endif
# We need this, in case the user has it in its environment
unexport CONFIG_
xconfig: $(obj)/qconf
$< $(silent) $(Kconfig)
gconfig: $(obj)/gconf
$< $(silent) $(Kconfig)
menuconfig: $(obj)/mconf
$< $(silent) $(Kconfig)
config: $(obj)/conf
$< $(silent) --oldaskconfig $(Kconfig)
nconfig: $(obj)/nconf
$< $(silent) $(Kconfig)
silentoldconfig: $(obj)/conf
$(Q)mkdir -p include/config include/generated
$(Q)test -e include/generated/autoksyms.h || \
touch include/generated/autoksyms.h
$< $(silent) --$@ $(Kconfig)
localyesconfig localmodconfig: $(obj)/streamline_config.pl $(obj)/conf
$(Q)mkdir -p include/config include/generated
$(Q)perl $< --$@ $(srctree) $(Kconfig) > .tmp.config
$(Q)if [ -f .config ]; then \
cmp -s .tmp.config .config || \
(mv -f .config .config.old.1; \
mv -f .tmp.config .config; \
$(obj)/conf $(silent) --silentoldconfig $(Kconfig); \
mv -f .config.old.1 .config.old) \
else \
mv -f .tmp.config .config; \
$(obj)/conf $(silent) --silentoldconfig $(Kconfig); \
fi
$(Q)rm -f .tmp.config
# Create new linux.pot file
# Adjust charset to UTF-8 in .po file to accept UTF-8 in Kconfig files
update-po-config: $(obj)/kxgettext $(obj)/gconf.glade.h
$(Q)$(kecho) " GEN config.pot"
$(Q)xgettext --default-domain=linux \
--add-comments --keyword=_ --keyword=N_ \
--from-code=UTF-8 \
--files-from=$(srctree)/scripts/kconfig/POTFILES.in \
--directory=$(srctree) --directory=$(objtree) \
--output $(obj)/config.pot
$(Q)sed -i s/CHARSET/UTF-8/ $(obj)/config.pot
$(Q)(for i in `ls $(srctree)/arch/*/Kconfig \
$(srctree)/arch/*/um/Kconfig`; \
do \
$(kecho) " GEN $$i"; \
$(obj)/kxgettext $$i \
>> $(obj)/config.pot; \
done )
$(Q)$(kecho) " GEN linux.pot"
$(Q)msguniq --sort-by-file --to-code=UTF-8 $(obj)/config.pot \
--output $(obj)/linux.pot
$(Q)rm -f $(obj)/config.pot
# These targets map 1:1 to the commandline options of 'conf'
simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \
alldefconfig randconfig listnewconfig olddefconfig
PHONY += $(simple-targets)
$(simple-targets): $(obj)/conf
$< $(silent) --$@ $(Kconfig)
PHONY += oldnoconfig savedefconfig defconfig
# oldnoconfig is an alias of olddefconfig, because people already are dependent
# on its behavior (sets new symbols to their default value but not 'n') with the
# counter-intuitive name.
oldnoconfig: olddefconfig
savedefconfig: $(obj)/conf
$< $(silent) --$@=defconfig $(Kconfig)
defconfig: $(obj)/conf
ifeq ($(KBUILD_DEFCONFIG),)
$< $(silent) --defconfig $(Kconfig)
else
ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)),)
@$(kecho) "*** Default configuration is based on '$(KBUILD_DEFCONFIG)'"
$(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG) $(Kconfig)
else
@$(kecho) "*** Default configuration is based on target '$(KBUILD_DEFCONFIG)'"
$(Q)$(MAKE) -f $(srctree)/Makefile $(KBUILD_DEFCONFIG)
endif
endif
%_defconfig: $(obj)/conf
$(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig)
configfiles=$(wildcard $(srctree)/kernel/configs/$@ $(srctree)/arch/$(SRCARCH)/configs/$@)
%.config: $(obj)/conf
$(if $(call configfiles),, $(error No configuration exists for this target on this architecture))
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m .config $(configfiles)
+$(Q)yes "" | $(MAKE) -f $(srctree)/Makefile oldconfig
PHONY += kvmconfig
kvmconfig: kvm_guest.config
@:
PHONY += xenconfig
xenconfig: xen.config
@:
PHONY += tinyconfig
tinyconfig:
$(Q)$(MAKE) -f $(srctree)/Makefile allnoconfig tiny.config
# Help text used by make help
help:
@echo ' config - Update current config utilising a line-oriented program'
@echo ' nconfig - Update current config utilising a ncurses menu based'
@echo ' program'
@echo ' menuconfig - Update current config utilising a menu based program'
@echo ' xconfig - Update current config utilising a Qt based front-end'
@echo ' gconfig - Update current config utilising a GTK+ based front-end'
@echo ' oldconfig - Update current config utilising a provided .config as base'
@echo ' localmodconfig - Update current config disabling modules not loaded'
@echo ' localyesconfig - Update current config converting local mods to core'
@echo ' silentoldconfig - Same as oldconfig, but quietly, additionally update deps'
@echo ' defconfig - New config with default from ARCH supplied defconfig'
@echo ' savedefconfig - Save current config as ./defconfig (minimal config)'
@echo ' allnoconfig - New config where all options are answered with no'
@echo ' allyesconfig - New config where all options are accepted with yes'
@echo ' allmodconfig - New config selecting modules when possible'
@echo ' alldefconfig - New config with all symbols set to default'
@echo ' randconfig - New config with random answer to all options'
@echo ' listnewconfig - List new options'
@echo ' olddefconfig - Same as silentoldconfig but sets new symbols to their'
@echo ' default value'
@echo ' kvmconfig - Enable additional options for kvm guest kernel support'
@echo ' xenconfig - Enable additional options for xen dom0 and guest kernel support'
@echo ' tinyconfig - Configure the tiniest possible kernel'
# lxdialog stuff
check-lxdialog := $(srctree)/$(src)/lxdialog/check-lxdialog.sh
# Use recursively expanded variables so we do not call gcc unless
# we really need to do so. (Do not call gcc as part of make mrproper)
HOST_EXTRACFLAGS += $(shell $(CONFIG_SHELL) $(check-lxdialog) -ccflags) \
-DLOCALE
# ===========================================================================
# Shared Makefile for the various kconfig executables:
# conf: Used for defconfig, oldconfig and related targets
# nconf: Used for the nconfig target.
# Utilizes ncurses
# mconf: Used for the menuconfig target
# Utilizes the lxdialog package
# qconf: Used for the xconfig target
# Based on Qt which needs to be installed to compile it
# gconf: Used for the gconfig target
# Based on GTK+ which needs to be installed to compile it
# object files used by all kconfig flavours
lxdialog := lxdialog/checklist.o lxdialog/util.o lxdialog/inputbox.o
lxdialog += lxdialog/textbox.o lxdialog/yesno.o lxdialog/menubox.o
conf-objs := conf.o zconf.tab.o
mconf-objs := mconf.o zconf.tab.o $(lxdialog)
nconf-objs := nconf.o zconf.tab.o nconf.gui.o
kxgettext-objs := kxgettext.o zconf.tab.o
qconf-cxxobjs := qconf.o
qconf-objs := zconf.tab.o
gconf-objs := gconf.o zconf.tab.o
hostprogs-y := conf nconf mconf kxgettext qconf gconf
clean-files := qconf.moc .tmp_qtcheck .tmp_gtkcheck
clean-files += zconf.tab.c zconf.lex.c gconf.glade.h
clean-files += config.pot linux.pot
# Check that we have the required ncurses stuff installed for lxdialog (menuconfig)
PHONY += $(obj)/dochecklxdialog
$(addprefix $(obj)/, mconf.o $(lxdialog)): $(obj)/dochecklxdialog
$(obj)/dochecklxdialog:
$(Q)$(CONFIG_SHELL) $(check-lxdialog) -check $(HOSTCC) $(HOST_EXTRACFLAGS) $(HOSTLOADLIBES_mconf)
always := dochecklxdialog
# Add environment specific flags
HOST_EXTRACFLAGS += $(shell $(CONFIG_SHELL) $(srctree)/$(src)/check.sh $(HOSTCC) $(HOSTCFLAGS))
# generated files seem to need this to find local include files
HOSTCFLAGS_zconf.lex.o := -I$(src)
HOSTCFLAGS_zconf.tab.o := -I$(src)
LEX_PREFIX_zconf := zconf
YACC_PREFIX_zconf := zconf
HOSTLOADLIBES_qconf = $(KC_QT_LIBS)
HOSTCXXFLAGS_qconf.o = $(KC_QT_CFLAGS)
HOSTLOADLIBES_gconf = `pkg-config --libs gtk+-2.0 gmodule-2.0 libglade-2.0`
HOSTCFLAGS_gconf.o = `pkg-config --cflags gtk+-2.0 gmodule-2.0 libglade-2.0` \
-Wno-missing-prototypes
HOSTLOADLIBES_mconf = $(shell $(CONFIG_SHELL) $(check-lxdialog) -ldflags $(HOSTCC))
HOSTLOADLIBES_nconf = $(shell \
pkg-config --libs menuw panelw ncursesw 2>/dev/null \
|| pkg-config --libs menu panel ncurses 2>/dev/null \
|| echo "-lmenu -lpanel -lncurses" )
$(obj)/qconf.o: $(obj)/.tmp_qtcheck
ifeq ($(MAKECMDGOALS),xconfig)
$(obj)/.tmp_qtcheck: $(src)/Makefile
-include $(obj)/.tmp_qtcheck
# Qt needs some extra effort...
$(obj)/.tmp_qtcheck:
@set -e; $(kecho) " CHECK qt"; \
if pkg-config --exists Qt5Core; then \
cflags="-std=c++11 -fPIC `pkg-config --cflags Qt5Core Qt5Gui Qt5Widgets`"; \
libs=`pkg-config --libs Qt5Core Qt5Gui Qt5Widgets`; \
moc=`pkg-config --variable=host_bins Qt5Core`/moc; \
elif pkg-config --exists QtCore; then \
cflags=`pkg-config --cflags QtCore QtGui`; \
libs=`pkg-config --libs QtCore QtGui`; \
moc=`pkg-config --variable=moc_location QtCore`; \
else \
echo >&2 "*"; \
echo >&2 "* Could not find Qt via pkg-config."; \
echo >&2 "* Please install either Qt 4.8 or 5.x. and make sure it's in PKG_CONFIG_PATH"; \
echo >&2 "*"; \
exit 1; \
fi; \
echo "KC_QT_CFLAGS=$$cflags" > $@; \
echo "KC_QT_LIBS=$$libs" >> $@; \
echo "KC_QT_MOC=$$moc" >> $@
endif
$(obj)/gconf.o: $(obj)/.tmp_gtkcheck
ifeq ($(MAKECMDGOALS),gconfig)
-include $(obj)/.tmp_gtkcheck
# GTK+ needs some extra effort, too...
$(obj)/.tmp_gtkcheck:
@if `pkg-config --exists gtk+-2.0 gmodule-2.0 libglade-2.0`; then \
if `pkg-config --atleast-version=2.0.0 gtk+-2.0`; then \
touch $@; \
else \
echo >&2 "*"; \
echo >&2 "* GTK+ is present but version >= 2.0.0 is required."; \
echo >&2 "*"; \
false; \
fi \
else \
echo >&2 "*"; \
echo >&2 "* Unable to find the GTK+ installation. Please make sure that"; \
echo >&2 "* the GTK+ 2.0 development package is correctly installed..."; \
echo >&2 "* You need gtk+-2.0, glib-2.0 and libglade-2.0."; \
echo >&2 "*"; \
false; \
fi
endif
$(obj)/zconf.tab.o: $(obj)/zconf.lex.c
$(obj)/qconf.o: $(obj)/qconf.moc
quiet_cmd_moc = MOC $@
cmd_moc = $(KC_QT_MOC) -i $< -o $@
$(obj)/%.moc: $(src)/%.h $(obj)/.tmp_qtcheck
$(call cmd,moc)
# Extract gconf menu items for i18n support
$(obj)/gconf.glade.h: $(obj)/gconf.glade
$(Q)intltool-extract --type=gettext/glade --srcdir=$(srctree) \
$(obj)/gconf.glade
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