forked from Minki/linux
ead751507d
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>
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Merge tag 'spdx_identifiers-4.14-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull initial SPDX identifiers from Greg KH:
"License cleanup: add SPDX license identifiers to some files
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>"
* tag 'spdx_identifiers-4.14-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
License cleanup: add SPDX license identifier to uapi header files with a license
License cleanup: add SPDX license identifier to uapi header files with no license
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
1720 lines
58 KiB
Makefile
1720 lines
58 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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VERSION = 4
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PATCHLEVEL = 14
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SUBLEVEL = 0
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|
EXTRAVERSION = -rc7
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NAME = Fearless Coyote
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|
|
|
# *DOCUMENTATION*
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|
# To see a list of typical targets execute "make help"
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|
# More info can be located in ./README
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|
# Comments in this file are targeted only to the developer, do not
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# expect to learn how to build the kernel reading this file.
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|
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|
# o Do not use make's built-in rules and variables
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|
# (this increases performance and avoids hard-to-debug behaviour);
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# o Look for make include files relative to root of kernel src
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MAKEFLAGS += -rR --include-dir=$(CURDIR)
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|
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# Avoid funny character set dependencies
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|
unexport LC_ALL
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|
LC_COLLATE=C
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|
LC_NUMERIC=C
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export LC_COLLATE LC_NUMERIC
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|
|
|
# Avoid interference with shell env settings
|
|
unexport GREP_OPTIONS
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|
|
# We are using a recursive build, so we need to do a little thinking
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|
# to get the ordering right.
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#
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# Most importantly: sub-Makefiles should only ever modify files in
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# their own directory. If in some directory we have a dependency on
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# a file in another dir (which doesn't happen often, but it's often
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# unavoidable when linking the built-in.o targets which finally
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# turn into vmlinux), we will call a sub make in that other dir, and
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# after that we are sure that everything which is in that other dir
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# is now up to date.
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#
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# The only cases where we need to modify files which have global
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# effects are thus separated out and done before the recursive
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# descending is started. They are now explicitly listed as the
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# prepare rule.
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|
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# Beautify output
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# ---------------------------------------------------------------------------
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#
|
|
# Normally, we echo the whole command before executing it. By making
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# that echo $($(quiet)$(cmd)), we now have the possibility to set
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# $(quiet) to choose other forms of output instead, e.g.
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#
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# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
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# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
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#
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|
# If $(quiet) is empty, the whole command will be printed.
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|
# If it is set to "quiet_", only the short version will be printed.
|
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# If it is set to "silent_", nothing will be printed at all, since
|
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# the variable $(silent_cmd_cc_o_c) doesn't exist.
|
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#
|
|
# A simple variant is to prefix commands with $(Q) - that's useful
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|
# for commands that shall be hidden in non-verbose mode.
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#
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# $(Q)ln $@ :<
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#
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# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
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# If KBUILD_VERBOSE equals 1 then the above command is displayed.
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#
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|
# To put more focus on warnings, be less verbose as default
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# Use 'make V=1' to see the full commands
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|
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ifeq ("$(origin V)", "command line")
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KBUILD_VERBOSE = $(V)
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endif
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ifndef KBUILD_VERBOSE
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KBUILD_VERBOSE = 0
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endif
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|
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ifeq ($(KBUILD_VERBOSE),1)
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quiet =
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Q =
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else
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quiet=quiet_
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Q = @
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endif
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|
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# If the user is running make -s (silent mode), suppress echoing of
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# commands
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ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
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quiet=silent_
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tools_silent=s
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endif
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export quiet Q KBUILD_VERBOSE
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|
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# kbuild supports saving output files in a separate directory.
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# To locate output files in a separate directory two syntaxes are supported.
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# In both cases the working directory must be the root of the kernel src.
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# 1) O=
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# Use "make O=dir/to/store/output/files/"
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#
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# 2) Set KBUILD_OUTPUT
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# Set the environment variable KBUILD_OUTPUT to point to the directory
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# where the output files shall be placed.
|
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# export KBUILD_OUTPUT=dir/to/store/output/files/
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# make
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#
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# The O= assignment takes precedence over the KBUILD_OUTPUT environment
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# variable.
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|
|
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# KBUILD_SRC is not intended to be used by the regular user (for now),
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# it is set on invocation of make with KBUILD_OUTPUT or O= specified.
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ifeq ($(KBUILD_SRC),)
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# OK, Make called in directory where kernel src resides
|
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# Do we want to locate output files in a separate directory?
|
|
ifeq ("$(origin O)", "command line")
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KBUILD_OUTPUT := $(O)
|
|
endif
|
|
|
|
# That's our default target when none is given on the command line
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|
PHONY := _all
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|
_all:
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|
|
# Cancel implicit rules on top Makefile
|
|
$(CURDIR)/Makefile Makefile: ;
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|
|
|
ifneq ($(words $(subst :, ,$(CURDIR))), 1)
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$(error main directory cannot contain spaces nor colons)
|
|
endif
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|
|
|
ifneq ($(KBUILD_OUTPUT),)
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|
# check that the output directory actually exists
|
|
saved-output := $(KBUILD_OUTPUT)
|
|
KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
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&& /bin/pwd)
|
|
$(if $(KBUILD_OUTPUT),, \
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$(error failed to create output directory "$(saved-output)"))
|
|
|
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PHONY += $(MAKECMDGOALS) sub-make
|
|
|
|
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
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@:
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|
|
|
# Invoke a second make in the output directory, passing relevant variables
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|
sub-make:
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|
$(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
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|
-f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
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|
|
|
# Leave processing to above invocation of make
|
|
skip-makefile := 1
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|
endif # ifneq ($(KBUILD_OUTPUT),)
|
|
endif # ifeq ($(KBUILD_SRC),)
|
|
|
|
# We process the rest of the Makefile if this is the final invocation of make
|
|
ifeq ($(skip-makefile),)
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|
|
|
# Do not print "Entering directory ...",
|
|
# but we want to display it when entering to the output directory
|
|
# so that IDEs/editors are able to understand relative filenames.
|
|
MAKEFLAGS += --no-print-directory
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|
|
|
# Call a source code checker (by default, "sparse") as part of the
|
|
# C compilation.
|
|
#
|
|
# Use 'make C=1' to enable checking of only re-compiled files.
|
|
# Use 'make C=2' to enable checking of *all* source files, regardless
|
|
# of whether they are re-compiled or not.
|
|
#
|
|
# See the file "Documentation/dev-tools/sparse.rst" for more details,
|
|
# including where to get the "sparse" utility.
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|
|
|
ifeq ("$(origin C)", "command line")
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|
KBUILD_CHECKSRC = $(C)
|
|
endif
|
|
ifndef KBUILD_CHECKSRC
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|
KBUILD_CHECKSRC = 0
|
|
endif
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|
|
|
# Use make M=dir to specify directory of external module to build
|
|
# Old syntax make ... SUBDIRS=$PWD is still supported
|
|
# Setting the environment variable KBUILD_EXTMOD take precedence
|
|
ifdef SUBDIRS
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|
KBUILD_EXTMOD ?= $(SUBDIRS)
|
|
endif
|
|
|
|
ifeq ("$(origin M)", "command line")
|
|
KBUILD_EXTMOD := $(M)
|
|
endif
|
|
|
|
# If building an external module we do not care about the all: rule
|
|
# but instead _all depend on modules
|
|
PHONY += all
|
|
ifeq ($(KBUILD_EXTMOD),)
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|
_all: all
|
|
else
|
|
_all: modules
|
|
endif
|
|
|
|
ifeq ($(KBUILD_SRC),)
|
|
# building in the source tree
|
|
srctree := .
|
|
else
|
|
ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
|
|
# building in a subdirectory of the source tree
|
|
srctree := ..
|
|
else
|
|
srctree := $(KBUILD_SRC)
|
|
endif
|
|
endif
|
|
objtree := .
|
|
src := $(srctree)
|
|
obj := $(objtree)
|
|
|
|
VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
|
|
|
|
export srctree objtree VPATH
|
|
|
|
# SUBARCH tells the usermode build what the underlying arch is. That is set
|
|
# first, and if a usermode build is happening, the "ARCH=um" on the command
|
|
# line overrides the setting of ARCH below. If a native build is happening,
|
|
# then ARCH is assigned, getting whatever value it gets normally, and
|
|
# SUBARCH is subsequently ignored.
|
|
|
|
SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
|
|
-e s/sun4u/sparc64/ \
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|
-e s/arm.*/arm/ -e s/sa110/arm/ \
|
|
-e s/s390x/s390/ -e s/parisc64/parisc/ \
|
|
-e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
|
|
-e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
|
|
|
|
# Cross compiling and selecting different set of gcc/bin-utils
|
|
# ---------------------------------------------------------------------------
|
|
#
|
|
# When performing cross compilation for other architectures ARCH shall be set
|
|
# to the target architecture. (See arch/* for the possibilities).
|
|
# ARCH can be set during invocation of make:
|
|
# make ARCH=ia64
|
|
# Another way is to have ARCH set in the environment.
|
|
# The default ARCH is the host where make is executed.
|
|
|
|
# CROSS_COMPILE specify the prefix used for all executables used
|
|
# during compilation. Only gcc and related bin-utils executables
|
|
# are prefixed with $(CROSS_COMPILE).
|
|
# CROSS_COMPILE can be set on the command line
|
|
# make CROSS_COMPILE=ia64-linux-
|
|
# Alternatively CROSS_COMPILE can be set in the environment.
|
|
# A third alternative is to store a setting in .config so that plain
|
|
# "make" in the configured kernel build directory always uses that.
|
|
# Default value for CROSS_COMPILE is not to prefix executables
|
|
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
|
|
ARCH ?= $(SUBARCH)
|
|
CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
|
|
|
|
# Architecture as present in compile.h
|
|
UTS_MACHINE := $(ARCH)
|
|
SRCARCH := $(ARCH)
|
|
|
|
# Additional ARCH settings for x86
|
|
ifeq ($(ARCH),i386)
|
|
SRCARCH := x86
|
|
endif
|
|
ifeq ($(ARCH),x86_64)
|
|
SRCARCH := x86
|
|
endif
|
|
|
|
# Additional ARCH settings for sparc
|
|
ifeq ($(ARCH),sparc32)
|
|
SRCARCH := sparc
|
|
endif
|
|
ifeq ($(ARCH),sparc64)
|
|
SRCARCH := sparc
|
|
endif
|
|
|
|
# Additional ARCH settings for sh
|
|
ifeq ($(ARCH),sh64)
|
|
SRCARCH := sh
|
|
endif
|
|
|
|
# Additional ARCH settings for tile
|
|
ifeq ($(ARCH),tilepro)
|
|
SRCARCH := tile
|
|
endif
|
|
ifeq ($(ARCH),tilegx)
|
|
SRCARCH := tile
|
|
endif
|
|
|
|
# Where to locate arch specific headers
|
|
hdr-arch := $(SRCARCH)
|
|
|
|
KCONFIG_CONFIG ?= .config
|
|
export KCONFIG_CONFIG
|
|
|
|
# SHELL used by kbuild
|
|
CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
|
|
else if [ -x /bin/bash ]; then echo /bin/bash; \
|
|
else echo sh; fi ; fi)
|
|
|
|
HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS)
|
|
HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS)
|
|
HOST_LFS_LIBS := $(shell getconf LFS_LIBS)
|
|
|
|
HOSTCC = gcc
|
|
HOSTCXX = g++
|
|
HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
|
|
-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS)
|
|
HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
|
|
HOSTLDFLAGS := $(HOST_LFS_LDFLAGS)
|
|
HOST_LOADLIBES := $(HOST_LFS_LIBS)
|
|
|
|
ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
|
|
HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
|
|
-Wno-missing-field-initializers -fno-delete-null-pointer-checks
|
|
endif
|
|
|
|
# Decide whether to build built-in, modular, or both.
|
|
# Normally, just do built-in.
|
|
|
|
KBUILD_MODULES :=
|
|
KBUILD_BUILTIN := 1
|
|
|
|
# If we have only "make modules", don't compile built-in objects.
|
|
# When we're building modules with modversions, we need to consider
|
|
# the built-in objects during the descend as well, in order to
|
|
# make sure the checksums are up to date before we record them.
|
|
|
|
ifeq ($(MAKECMDGOALS),modules)
|
|
KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
|
|
endif
|
|
|
|
# If we have "make <whatever> modules", compile modules
|
|
# in addition to whatever we do anyway.
|
|
# Just "make" or "make all" shall build modules as well
|
|
|
|
ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
|
|
KBUILD_MODULES := 1
|
|
endif
|
|
|
|
ifeq ($(MAKECMDGOALS),)
|
|
KBUILD_MODULES := 1
|
|
endif
|
|
|
|
export KBUILD_MODULES KBUILD_BUILTIN
|
|
export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
|
|
|
|
# We need some generic definitions (do not try to remake the file).
|
|
scripts/Kbuild.include: ;
|
|
include scripts/Kbuild.include
|
|
|
|
# Make variables (CC, etc...)
|
|
AS = $(CROSS_COMPILE)as
|
|
LD = $(CROSS_COMPILE)ld
|
|
CC = $(CROSS_COMPILE)gcc
|
|
CPP = $(CC) -E
|
|
AR = $(CROSS_COMPILE)ar
|
|
NM = $(CROSS_COMPILE)nm
|
|
STRIP = $(CROSS_COMPILE)strip
|
|
OBJCOPY = $(CROSS_COMPILE)objcopy
|
|
OBJDUMP = $(CROSS_COMPILE)objdump
|
|
AWK = awk
|
|
GENKSYMS = scripts/genksyms/genksyms
|
|
INSTALLKERNEL := installkernel
|
|
DEPMOD = /sbin/depmod
|
|
PERL = perl
|
|
PYTHON = python
|
|
CHECK = sparse
|
|
|
|
CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
|
|
-Wbitwise -Wno-return-void $(CF)
|
|
NOSTDINC_FLAGS =
|
|
CFLAGS_MODULE =
|
|
AFLAGS_MODULE =
|
|
LDFLAGS_MODULE =
|
|
CFLAGS_KERNEL =
|
|
AFLAGS_KERNEL =
|
|
LDFLAGS_vmlinux =
|
|
CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,)
|
|
CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,)
|
|
|
|
|
|
# Use USERINCLUDE when you must reference the UAPI directories only.
|
|
USERINCLUDE := \
|
|
-I$(srctree)/arch/$(hdr-arch)/include/uapi \
|
|
-I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \
|
|
-I$(srctree)/include/uapi \
|
|
-I$(objtree)/include/generated/uapi \
|
|
-include $(srctree)/include/linux/kconfig.h
|
|
|
|
# Use LINUXINCLUDE when you must reference the include/ directory.
|
|
# Needed to be compatible with the O= option
|
|
LINUXINCLUDE := \
|
|
-I$(srctree)/arch/$(hdr-arch)/include \
|
|
-I$(objtree)/arch/$(hdr-arch)/include/generated \
|
|
$(if $(KBUILD_SRC), -I$(srctree)/include) \
|
|
-I$(objtree)/include \
|
|
$(USERINCLUDE)
|
|
|
|
KBUILD_CPPFLAGS := -D__KERNEL__
|
|
|
|
KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
|
|
-fno-strict-aliasing -fno-common -fshort-wchar \
|
|
-Werror-implicit-function-declaration \
|
|
-Wno-format-security \
|
|
-std=gnu89 $(call cc-option,-fno-PIE)
|
|
|
|
|
|
KBUILD_AFLAGS_KERNEL :=
|
|
KBUILD_CFLAGS_KERNEL :=
|
|
KBUILD_AFLAGS := -D__ASSEMBLY__ $(call cc-option,-fno-PIE)
|
|
KBUILD_AFLAGS_MODULE := -DMODULE
|
|
KBUILD_CFLAGS_MODULE := -DMODULE
|
|
KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
|
|
|
|
# Read KERNELRELEASE from include/config/kernel.release (if it exists)
|
|
KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
|
|
KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
|
|
|
|
export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
|
|
export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
|
|
export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES
|
|
export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
|
|
export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
|
|
|
|
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
|
|
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN
|
|
export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
|
|
export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
|
|
export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
|
|
export KBUILD_ARFLAGS
|
|
|
|
# When compiling out-of-tree modules, put MODVERDIR in the module
|
|
# tree rather than in the kernel tree. The kernel tree might
|
|
# even be read-only.
|
|
export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
|
|
|
|
# Files to ignore in find ... statements
|
|
|
|
export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
|
|
-name CVS -o -name .pc -o -name .hg -o -name .git \) \
|
|
-prune -o
|
|
export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
|
|
--exclude CVS --exclude .pc --exclude .hg --exclude .git
|
|
|
|
# ===========================================================================
|
|
# Rules shared between *config targets and build targets
|
|
|
|
# Basic helpers built in scripts/basic/
|
|
PHONY += scripts_basic
|
|
scripts_basic:
|
|
$(Q)$(MAKE) $(build)=scripts/basic
|
|
$(Q)rm -f .tmp_quiet_recordmcount
|
|
|
|
# To avoid any implicit rule to kick in, define an empty command.
|
|
scripts/basic/%: scripts_basic ;
|
|
|
|
PHONY += outputmakefile
|
|
# outputmakefile generates a Makefile in the output directory, if using a
|
|
# separate output directory. This allows convenient use of make in the
|
|
# output directory.
|
|
outputmakefile:
|
|
ifneq ($(KBUILD_SRC),)
|
|
$(Q)ln -fsn $(srctree) source
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
|
|
$(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
|
|
endif
|
|
|
|
# Support for using generic headers in asm-generic
|
|
PHONY += asm-generic uapi-asm-generic
|
|
asm-generic: uapi-asm-generic
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
|
|
src=asm obj=arch/$(SRCARCH)/include/generated/asm
|
|
uapi-asm-generic:
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
|
|
src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
|
|
|
|
# To make sure we do not include .config for any of the *config targets
|
|
# catch them early, and hand them over to scripts/kconfig/Makefile
|
|
# It is allowed to specify more targets when calling make, including
|
|
# mixing *config targets and build targets.
|
|
# For example 'make oldconfig all'.
|
|
# Detect when mixed targets is specified, and make a second invocation
|
|
# of make so .config is not included in this case either (for *config).
|
|
|
|
version_h := include/generated/uapi/linux/version.h
|
|
old_version_h := include/linux/version.h
|
|
|
|
no-dot-config-targets := clean mrproper distclean \
|
|
cscope gtags TAGS tags help% %docs check% coccicheck \
|
|
$(version_h) headers_% archheaders archscripts \
|
|
kernelversion %src-pkg
|
|
|
|
config-targets := 0
|
|
mixed-targets := 0
|
|
dot-config := 1
|
|
|
|
ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
|
|
ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
|
|
dot-config := 0
|
|
endif
|
|
endif
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
ifneq ($(filter config %config,$(MAKECMDGOALS)),)
|
|
config-targets := 1
|
|
ifneq ($(words $(MAKECMDGOALS)),1)
|
|
mixed-targets := 1
|
|
endif
|
|
endif
|
|
endif
|
|
# install and modules_install need also be processed one by one
|
|
ifneq ($(filter install,$(MAKECMDGOALS)),)
|
|
ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
|
|
mixed-targets := 1
|
|
endif
|
|
endif
|
|
|
|
ifeq ($(mixed-targets),1)
|
|
# ===========================================================================
|
|
# We're called with mixed targets (*config and build targets).
|
|
# Handle them one by one.
|
|
|
|
PHONY += $(MAKECMDGOALS) __build_one_by_one
|
|
|
|
$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
|
|
@:
|
|
|
|
__build_one_by_one:
|
|
$(Q)set -e; \
|
|
for i in $(MAKECMDGOALS); do \
|
|
$(MAKE) -f $(srctree)/Makefile $$i; \
|
|
done
|
|
|
|
else
|
|
ifeq ($(config-targets),1)
|
|
# ===========================================================================
|
|
# *config targets only - make sure prerequisites are updated, and descend
|
|
# in scripts/kconfig to make the *config target
|
|
|
|
# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
|
|
# KBUILD_DEFCONFIG may point out an alternative default configuration
|
|
# used for 'make defconfig'
|
|
include arch/$(SRCARCH)/Makefile
|
|
export KBUILD_DEFCONFIG KBUILD_KCONFIG
|
|
|
|
config: scripts_basic outputmakefile FORCE
|
|
$(Q)$(MAKE) $(build)=scripts/kconfig $@
|
|
|
|
%config: scripts_basic outputmakefile FORCE
|
|
$(Q)$(MAKE) $(build)=scripts/kconfig $@
|
|
|
|
else
|
|
# ===========================================================================
|
|
# Build targets only - this includes vmlinux, arch specific targets, clean
|
|
# targets and others. In general all targets except *config targets.
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
# Additional helpers built in scripts/
|
|
# Carefully list dependencies so we do not try to build scripts twice
|
|
# in parallel
|
|
PHONY += scripts
|
|
scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
|
|
asm-generic gcc-plugins
|
|
$(Q)$(MAKE) $(build)=$(@)
|
|
|
|
# Objects we will link into vmlinux / subdirs we need to visit
|
|
init-y := init/
|
|
drivers-y := drivers/ sound/ firmware/
|
|
net-y := net/
|
|
libs-y := lib/
|
|
core-y := usr/
|
|
virt-y := virt/
|
|
endif # KBUILD_EXTMOD
|
|
|
|
ifeq ($(dot-config),1)
|
|
# Read in config
|
|
-include include/config/auto.conf
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
# Read in dependencies to all Kconfig* files, make sure to run
|
|
# oldconfig if changes are detected.
|
|
-include include/config/auto.conf.cmd
|
|
|
|
# To avoid any implicit rule to kick in, define an empty command
|
|
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
|
|
|
|
# If .config is newer than include/config/auto.conf, someone tinkered
|
|
# with it and forgot to run make oldconfig.
|
|
# if auto.conf.cmd is missing then we are probably in a cleaned tree so
|
|
# we execute the config step to be sure to catch updated Kconfig files
|
|
include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
|
|
$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
|
|
else
|
|
# external modules needs include/generated/autoconf.h and include/config/auto.conf
|
|
# but do not care if they are up-to-date. Use auto.conf to trigger the test
|
|
PHONY += include/config/auto.conf
|
|
|
|
include/config/auto.conf:
|
|
$(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
|
|
echo >&2; \
|
|
echo >&2 " ERROR: Kernel configuration is invalid."; \
|
|
echo >&2 " include/generated/autoconf.h or $@ are missing.";\
|
|
echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
|
|
echo >&2 ; \
|
|
/bin/false)
|
|
|
|
endif # KBUILD_EXTMOD
|
|
|
|
else
|
|
# Dummy target needed, because used as prerequisite
|
|
include/config/auto.conf: ;
|
|
endif # $(dot-config)
|
|
|
|
# For the kernel to actually contain only the needed exported symbols,
|
|
# we have to build modules as well to determine what those symbols are.
|
|
# (this can be evaluated only once include/config/auto.conf has been included)
|
|
ifdef CONFIG_TRIM_UNUSED_KSYMS
|
|
KBUILD_MODULES := 1
|
|
endif
|
|
|
|
# The all: target is the default when no target is given on the
|
|
# command line.
|
|
# This allow a user to issue only 'make' to build a kernel including modules
|
|
# Defaults to vmlinux, but the arch makefile usually adds further targets
|
|
all: vmlinux
|
|
|
|
# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
|
|
# values of the respective KBUILD_* variables
|
|
ARCH_CPPFLAGS :=
|
|
ARCH_AFLAGS :=
|
|
ARCH_CFLAGS :=
|
|
include arch/$(SRCARCH)/Makefile
|
|
|
|
KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context)
|
|
|
|
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
|
|
KBUILD_CFLAGS += $(call cc-option,-Oz,-Os)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,)
|
|
else
|
|
ifdef CONFIG_PROFILE_ALL_BRANCHES
|
|
KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,)
|
|
else
|
|
KBUILD_CFLAGS += -O2
|
|
endif
|
|
endif
|
|
|
|
KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \
|
|
$(call cc-disable-warning,maybe-uninitialized,))
|
|
|
|
# Tell gcc to never replace conditional load with a non-conditional one
|
|
KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
|
|
|
|
# check for 'asm goto'
|
|
ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y)
|
|
KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
|
|
KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
|
|
endif
|
|
|
|
include scripts/Makefile.gcc-plugins
|
|
|
|
ifdef CONFIG_READABLE_ASM
|
|
# Disable optimizations that make assembler listings hard to read.
|
|
# reorder blocks reorders the control in the function
|
|
# ipa clone creates specialized cloned functions
|
|
# partial inlining inlines only parts of functions
|
|
KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
|
|
$(call cc-option,-fno-ipa-cp-clone,) \
|
|
$(call cc-option,-fno-partial-inlining)
|
|
endif
|
|
|
|
ifneq ($(CONFIG_FRAME_WARN),0)
|
|
KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
|
|
endif
|
|
|
|
# This selects the stack protector compiler flag. Testing it is delayed
|
|
# until after .config has been reprocessed, in the prepare-compiler-check
|
|
# target.
|
|
ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
|
|
stackp-flag := -fstack-protector
|
|
stackp-name := REGULAR
|
|
else
|
|
ifdef CONFIG_CC_STACKPROTECTOR_STRONG
|
|
stackp-flag := -fstack-protector-strong
|
|
stackp-name := STRONG
|
|
else
|
|
# Force off for distro compilers that enable stack protector by default.
|
|
stackp-flag := $(call cc-option, -fno-stack-protector)
|
|
endif
|
|
endif
|
|
# Find arch-specific stack protector compiler sanity-checking script.
|
|
ifdef CONFIG_CC_STACKPROTECTOR
|
|
stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
|
|
stackp-check := $(wildcard $(stackp-path))
|
|
endif
|
|
KBUILD_CFLAGS += $(stackp-flag)
|
|
|
|
ifeq ($(cc-name),clang)
|
|
ifneq ($(CROSS_COMPILE),)
|
|
CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%))
|
|
GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..)
|
|
endif
|
|
ifneq ($(GCC_TOOLCHAIN),)
|
|
CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN)
|
|
endif
|
|
KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
|
|
KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
|
|
KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
|
|
# Quiet clang warning: comparison of unsigned expression < 0 is always false
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
|
|
# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
|
|
# source of a reference will be _MergedGlobals and not on of the whitelisted names.
|
|
# See modpost pattern 2
|
|
KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
|
|
KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
|
|
KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
|
|
KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
|
|
else
|
|
|
|
# These warnings generated too much noise in a regular build.
|
|
# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
|
|
endif
|
|
|
|
ifdef CONFIG_FRAME_POINTER
|
|
KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
|
|
else
|
|
# Some targets (ARM with Thumb2, for example), can't be built with frame
|
|
# pointers. For those, we don't have FUNCTION_TRACER automatically
|
|
# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
|
|
# incompatible with -fomit-frame-pointer with current GCC, so we don't use
|
|
# -fomit-frame-pointer with FUNCTION_TRACER.
|
|
ifndef CONFIG_FUNCTION_TRACER
|
|
KBUILD_CFLAGS += -fomit-frame-pointer
|
|
endif
|
|
endif
|
|
|
|
KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
|
|
|
|
ifdef CONFIG_DEBUG_INFO
|
|
ifdef CONFIG_DEBUG_INFO_SPLIT
|
|
KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
|
|
else
|
|
KBUILD_CFLAGS += -g
|
|
endif
|
|
KBUILD_AFLAGS += -Wa,-gdwarf-2
|
|
endif
|
|
ifdef CONFIG_DEBUG_INFO_DWARF4
|
|
KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
|
|
endif
|
|
|
|
ifdef CONFIG_DEBUG_INFO_REDUCED
|
|
KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
|
|
$(call cc-option,-fno-var-tracking)
|
|
endif
|
|
|
|
ifdef CONFIG_FUNCTION_TRACER
|
|
ifndef CC_FLAGS_FTRACE
|
|
CC_FLAGS_FTRACE := -pg
|
|
endif
|
|
export CC_FLAGS_FTRACE
|
|
ifdef CONFIG_HAVE_FENTRY
|
|
CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
|
|
endif
|
|
KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
|
|
KBUILD_AFLAGS += $(CC_USING_FENTRY)
|
|
ifdef CONFIG_DYNAMIC_FTRACE
|
|
ifdef CONFIG_HAVE_C_RECORDMCOUNT
|
|
BUILD_C_RECORDMCOUNT := y
|
|
export BUILD_C_RECORDMCOUNT
|
|
endif
|
|
endif
|
|
endif
|
|
|
|
# We trigger additional mismatches with less inlining
|
|
ifdef CONFIG_DEBUG_SECTION_MISMATCH
|
|
KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
|
|
endif
|
|
|
|
ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
|
|
KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,)
|
|
KBUILD_CFLAGS += $(call cc-option,-fdata-sections,)
|
|
endif
|
|
|
|
# arch Makefile may override CC so keep this after arch Makefile is included
|
|
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
|
|
CHECKFLAGS += $(NOSTDINC_FLAGS)
|
|
|
|
# warn about C99 declaration after statement
|
|
KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
|
|
|
|
# disable pointer signed / unsigned warnings in gcc 4.0
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
|
|
|
|
# disable invalid "can't wrap" optimizations for signed / pointers
|
|
KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
|
|
|
|
# conserve stack if available
|
|
KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
|
|
|
|
# disallow errors like 'EXPORT_GPL(foo);' with missing header
|
|
KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
|
|
|
|
# require functions to have arguments in prototypes, not empty 'int foo()'
|
|
KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
|
|
|
|
# Prohibit date/time macros, which would make the build non-deterministic
|
|
KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
|
|
|
|
# enforce correct pointer usage
|
|
KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
|
|
|
|
# Require designated initializers for all marked structures
|
|
KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
|
|
|
|
# use the deterministic mode of AR if available
|
|
KBUILD_ARFLAGS := $(call ar-option,D)
|
|
|
|
include scripts/Makefile.kasan
|
|
include scripts/Makefile.extrawarn
|
|
include scripts/Makefile.ubsan
|
|
|
|
# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
|
|
# last assignments
|
|
KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
|
|
KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
|
|
KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
|
|
|
|
# Use --build-id when available.
|
|
LDFLAGS_BUILD_ID := $(patsubst -Wl$(comma)%,%,\
|
|
$(call cc-ldoption, -Wl$(comma)--build-id,))
|
|
KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
|
|
LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
|
|
|
|
ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
|
|
LDFLAGS_vmlinux += $(call ld-option, --gc-sections,)
|
|
endif
|
|
|
|
ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
|
|
LDFLAGS_vmlinux += $(call ld-option, -X,)
|
|
endif
|
|
|
|
# Default kernel image to build when no specific target is given.
|
|
# KBUILD_IMAGE may be overruled on the command line or
|
|
# set in the environment
|
|
# Also any assignments in arch/$(ARCH)/Makefile take precedence over
|
|
# this default value
|
|
export KBUILD_IMAGE ?= vmlinux
|
|
|
|
#
|
|
# INSTALL_PATH specifies where to place the updated kernel and system map
|
|
# images. Default is /boot, but you can set it to other values
|
|
export INSTALL_PATH ?= /boot
|
|
|
|
#
|
|
# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
|
|
# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
|
|
# an argument if needed. Otherwise it defaults to the kernel install path
|
|
#
|
|
export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
|
|
|
|
#
|
|
# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
|
|
# relocations required by build roots. This is not defined in the
|
|
# makefile but the argument can be passed to make if needed.
|
|
#
|
|
|
|
MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
|
|
export MODLIB
|
|
|
|
#
|
|
# INSTALL_MOD_STRIP, if defined, will cause modules to be
|
|
# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
|
|
# the default option --strip-debug will be used. Otherwise,
|
|
# INSTALL_MOD_STRIP value will be used as the options to the strip command.
|
|
|
|
ifdef INSTALL_MOD_STRIP
|
|
ifeq ($(INSTALL_MOD_STRIP),1)
|
|
mod_strip_cmd = $(STRIP) --strip-debug
|
|
else
|
|
mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
|
|
endif # INSTALL_MOD_STRIP=1
|
|
else
|
|
mod_strip_cmd = true
|
|
endif # INSTALL_MOD_STRIP
|
|
export mod_strip_cmd
|
|
|
|
# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
|
|
# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
|
|
# or CONFIG_MODULE_COMPRESS_XZ.
|
|
|
|
mod_compress_cmd = true
|
|
ifdef CONFIG_MODULE_COMPRESS
|
|
ifdef CONFIG_MODULE_COMPRESS_GZIP
|
|
mod_compress_cmd = gzip -n -f
|
|
endif # CONFIG_MODULE_COMPRESS_GZIP
|
|
ifdef CONFIG_MODULE_COMPRESS_XZ
|
|
mod_compress_cmd = xz -f
|
|
endif # CONFIG_MODULE_COMPRESS_XZ
|
|
endif # CONFIG_MODULE_COMPRESS
|
|
export mod_compress_cmd
|
|
|
|
# Select initial ramdisk compression format, default is gzip(1).
|
|
# This shall be used by the dracut(8) tool while creating an initramfs image.
|
|
#
|
|
INITRD_COMPRESS-y := gzip
|
|
INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
|
|
INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
|
|
INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
|
|
INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
|
|
INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
|
|
# do not export INITRD_COMPRESS, since we didn't actually
|
|
# choose a sane default compression above.
|
|
# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
|
|
|
|
ifdef CONFIG_MODULE_SIG_ALL
|
|
$(eval $(call config_filename,MODULE_SIG_KEY))
|
|
|
|
mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
|
|
else
|
|
mod_sign_cmd = true
|
|
endif
|
|
export mod_sign_cmd
|
|
|
|
ifdef CONFIG_STACK_VALIDATION
|
|
has_libelf := $(call try-run,\
|
|
echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
|
|
ifeq ($(has_libelf),1)
|
|
objtool_target := tools/objtool FORCE
|
|
else
|
|
ifdef CONFIG_ORC_UNWINDER
|
|
$(error "Cannot generate ORC metadata for CONFIG_ORC_UNWINDER=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
|
|
else
|
|
$(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
|
|
endif
|
|
SKIP_STACK_VALIDATION := 1
|
|
export SKIP_STACK_VALIDATION
|
|
endif
|
|
endif
|
|
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
|
|
|
|
vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
|
|
$(core-y) $(core-m) $(drivers-y) $(drivers-m) \
|
|
$(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
|
|
|
|
vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
|
|
$(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
|
|
|
|
init-y := $(patsubst %/, %/built-in.o, $(init-y))
|
|
core-y := $(patsubst %/, %/built-in.o, $(core-y))
|
|
drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
|
|
net-y := $(patsubst %/, %/built-in.o, $(net-y))
|
|
libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
|
|
libs-y2 := $(filter-out %.a, $(patsubst %/, %/built-in.o, $(libs-y)))
|
|
virt-y := $(patsubst %/, %/built-in.o, $(virt-y))
|
|
|
|
# Externally visible symbols (used by link-vmlinux.sh)
|
|
export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
|
|
export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y)
|
|
export KBUILD_VMLINUX_LIBS := $(libs-y1)
|
|
export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
|
|
export LDFLAGS_vmlinux
|
|
# used by scripts/package/Makefile
|
|
export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
|
|
|
|
vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS)
|
|
|
|
# Include targets which we want to execute sequentially if the rest of the
|
|
# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
|
|
# evaluated more than once.
|
|
PHONY += vmlinux_prereq
|
|
vmlinux_prereq: $(vmlinux-deps) FORCE
|
|
ifdef CONFIG_HEADERS_CHECK
|
|
$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
|
|
endif
|
|
ifdef CONFIG_GDB_SCRIPTS
|
|
$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
|
|
endif
|
|
ifdef CONFIG_TRIM_UNUSED_KSYMS
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
|
|
"$(MAKE) -f $(srctree)/Makefile vmlinux"
|
|
endif
|
|
|
|
# standalone target for easier testing
|
|
include/generated/autoksyms.h: FORCE
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
|
|
|
|
ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
|
|
|
|
# Final link of vmlinux with optional arch pass after final link
|
|
cmd_link-vmlinux = \
|
|
$(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \
|
|
$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
|
|
|
|
vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE
|
|
+$(call if_changed,link-vmlinux)
|
|
|
|
# Build samples along the rest of the kernel
|
|
ifdef CONFIG_SAMPLES
|
|
vmlinux-dirs += samples
|
|
endif
|
|
|
|
# The actual objects are generated when descending,
|
|
# make sure no implicit rule kicks in
|
|
$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
|
|
|
|
# Handle descending into subdirectories listed in $(vmlinux-dirs)
|
|
# Preset locale variables to speed up the build process. Limit locale
|
|
# tweaks to this spot to avoid wrong language settings when running
|
|
# make menuconfig etc.
|
|
# Error messages still appears in the original language
|
|
|
|
PHONY += $(vmlinux-dirs)
|
|
$(vmlinux-dirs): prepare scripts
|
|
$(Q)$(MAKE) $(build)=$@
|
|
|
|
define filechk_kernel.release
|
|
echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
|
|
endef
|
|
|
|
# Store (new) KERNELRELEASE string in include/config/kernel.release
|
|
include/config/kernel.release: include/config/auto.conf FORCE
|
|
$(call filechk,kernel.release)
|
|
|
|
|
|
# Things we need to do before we recursively start building the kernel
|
|
# or the modules are listed in "prepare".
|
|
# A multi level approach is used. prepareN is processed before prepareN-1.
|
|
# archprepare is used in arch Makefiles and when processed asm symlink,
|
|
# version.h and scripts_basic is processed / created.
|
|
|
|
# Listed in dependency order
|
|
PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
|
|
|
|
# prepare3 is used to check if we are building in a separate output directory,
|
|
# and if so do:
|
|
# 1) Check that make has not been executed in the kernel src $(srctree)
|
|
prepare3: include/config/kernel.release
|
|
ifneq ($(KBUILD_SRC),)
|
|
@$(kecho) ' Using $(srctree) as source for kernel'
|
|
$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
|
|
echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
|
|
echo >&2 " in the '$(srctree)' directory.";\
|
|
/bin/false; \
|
|
fi;
|
|
endif
|
|
|
|
# prepare2 creates a makefile if using a separate output directory.
|
|
# From this point forward, .config has been reprocessed, so any rules
|
|
# that need to depend on updated CONFIG_* values can be checked here.
|
|
prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic
|
|
|
|
prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
|
|
include/config/auto.conf
|
|
$(cmd_crmodverdir)
|
|
|
|
archprepare: archheaders archscripts prepare1 scripts_basic
|
|
|
|
prepare0: archprepare gcc-plugins
|
|
$(Q)$(MAKE) $(build)=.
|
|
|
|
# All the preparing..
|
|
prepare: prepare0 prepare-objtool
|
|
|
|
PHONY += prepare-objtool
|
|
prepare-objtool: $(objtool_target)
|
|
|
|
# Check for CONFIG flags that require compiler support. Abort the build
|
|
# after .config has been processed, but before the kernel build starts.
|
|
#
|
|
# For security-sensitive CONFIG options, we don't want to fallback and/or
|
|
# silently change which compiler flags will be used, since that leads to
|
|
# producing kernels with different security feature characteristics
|
|
# depending on the compiler used. (For example, "But I selected
|
|
# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
|
|
PHONY += prepare-compiler-check
|
|
prepare-compiler-check: FORCE
|
|
# Make sure compiler supports requested stack protector flag.
|
|
ifdef stackp-name
|
|
ifeq ($(call cc-option, $(stackp-flag)),)
|
|
@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
|
|
$(stackp-flag) not supported by compiler >&2 && exit 1
|
|
endif
|
|
endif
|
|
# Make sure compiler does not have buggy stack-protector support.
|
|
ifdef stackp-check
|
|
ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
|
|
@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
|
|
$(stackp-flag) available but compiler is broken >&2 && exit 1
|
|
endif
|
|
endif
|
|
@:
|
|
|
|
# Generate some files
|
|
# ---------------------------------------------------------------------------
|
|
|
|
# KERNELRELEASE can change from a few different places, meaning version.h
|
|
# needs to be updated, so this check is forced on all builds
|
|
|
|
uts_len := 64
|
|
define filechk_utsrelease.h
|
|
if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
|
|
echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
|
|
exit 1; \
|
|
fi; \
|
|
(echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
|
|
endef
|
|
|
|
define filechk_version.h
|
|
(echo \#define LINUX_VERSION_CODE $(shell \
|
|
expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
|
|
echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
|
|
endef
|
|
|
|
$(version_h): $(srctree)/Makefile FORCE
|
|
$(call filechk,version.h)
|
|
$(Q)rm -f $(old_version_h)
|
|
|
|
include/generated/utsrelease.h: include/config/kernel.release FORCE
|
|
$(call filechk,utsrelease.h)
|
|
|
|
PHONY += headerdep
|
|
headerdep:
|
|
$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
|
|
$(srctree)/scripts/headerdep.pl -I$(srctree)/include
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Kernel headers
|
|
|
|
#Default location for installed headers
|
|
export INSTALL_HDR_PATH = $(objtree)/usr
|
|
|
|
# If we do an all arch process set dst to include/arch-$(hdr-arch)
|
|
hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(hdr-arch), dst=include)
|
|
|
|
PHONY += archheaders
|
|
archheaders:
|
|
|
|
PHONY += archscripts
|
|
archscripts:
|
|
|
|
PHONY += __headers
|
|
__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
|
|
$(Q)$(MAKE) $(build)=scripts build_unifdef
|
|
|
|
PHONY += headers_install_all
|
|
headers_install_all:
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
|
|
|
|
PHONY += headers_install
|
|
headers_install: __headers
|
|
$(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
|
|
$(error Headers not exportable for the $(SRCARCH) architecture))
|
|
$(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include
|
|
$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi $(hdr-dst)
|
|
|
|
PHONY += headers_check_all
|
|
headers_check_all: headers_install_all
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
|
|
|
|
PHONY += headers_check
|
|
headers_check: headers_install
|
|
$(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1
|
|
$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi $(hdr-dst) HDRCHECK=1
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Kernel selftest
|
|
|
|
PHONY += kselftest
|
|
kselftest:
|
|
$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
|
|
|
|
PHONY += kselftest-clean
|
|
kselftest-clean:
|
|
$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean
|
|
|
|
PHONY += kselftest-merge
|
|
kselftest-merge:
|
|
$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
|
|
-m $(objtree)/.config \
|
|
$(srctree)/tools/testing/selftests/*/config
|
|
+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Modules
|
|
|
|
ifdef CONFIG_MODULES
|
|
|
|
# By default, build modules as well
|
|
|
|
all: modules
|
|
|
|
# Build modules
|
|
#
|
|
# A module can be listed more than once in obj-m resulting in
|
|
# duplicate lines in modules.order files. Those are removed
|
|
# using awk while concatenating to the final file.
|
|
|
|
PHONY += modules
|
|
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
|
|
$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
|
|
@$(kecho) ' Building modules, stage 2.';
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
|
|
|
|
modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
|
|
$(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
|
|
|
|
%/modules.builtin: include/config/auto.conf
|
|
$(Q)$(MAKE) $(modbuiltin)=$*
|
|
|
|
|
|
# Target to prepare building external modules
|
|
PHONY += modules_prepare
|
|
modules_prepare: prepare scripts
|
|
|
|
# Target to install modules
|
|
PHONY += modules_install
|
|
modules_install: _modinst_ _modinst_post
|
|
|
|
PHONY += _modinst_
|
|
_modinst_:
|
|
@rm -rf $(MODLIB)/kernel
|
|
@rm -f $(MODLIB)/source
|
|
@mkdir -p $(MODLIB)/kernel
|
|
@ln -s $(abspath $(srctree)) $(MODLIB)/source
|
|
@if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
|
|
rm -f $(MODLIB)/build ; \
|
|
ln -s $(CURDIR) $(MODLIB)/build ; \
|
|
fi
|
|
@cp -f $(objtree)/modules.order $(MODLIB)/
|
|
@cp -f $(objtree)/modules.builtin $(MODLIB)/
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
|
|
|
|
# This depmod is only for convenience to give the initial
|
|
# boot a modules.dep even before / is mounted read-write. However the
|
|
# boot script depmod is the master version.
|
|
PHONY += _modinst_post
|
|
_modinst_post: _modinst_
|
|
$(call cmd,depmod)
|
|
|
|
ifeq ($(CONFIG_MODULE_SIG), y)
|
|
PHONY += modules_sign
|
|
modules_sign:
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
|
|
endif
|
|
|
|
else # CONFIG_MODULES
|
|
|
|
# Modules not configured
|
|
# ---------------------------------------------------------------------------
|
|
|
|
PHONY += modules modules_install
|
|
modules modules_install:
|
|
@echo >&2
|
|
@echo >&2 "The present kernel configuration has modules disabled."
|
|
@echo >&2 "Type 'make config' and enable loadable module support."
|
|
@echo >&2 "Then build a kernel with module support enabled."
|
|
@echo >&2
|
|
@exit 1
|
|
|
|
endif # CONFIG_MODULES
|
|
|
|
###
|
|
# Cleaning is done on three levels.
|
|
# make clean Delete most generated files
|
|
# Leave enough to build external modules
|
|
# make mrproper Delete the current configuration, and all generated files
|
|
# make distclean Remove editor backup files, patch leftover files and the like
|
|
|
|
# Directories & files removed with 'make clean'
|
|
CLEAN_DIRS += $(MODVERDIR)
|
|
|
|
# Directories & files removed with 'make mrproper'
|
|
MRPROPER_DIRS += include/config usr/include include/generated \
|
|
arch/*/include/generated .tmp_objdiff
|
|
MRPROPER_FILES += .config .config.old .version .old_version \
|
|
Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
|
|
signing_key.pem signing_key.priv signing_key.x509 \
|
|
x509.genkey extra_certificates signing_key.x509.keyid \
|
|
signing_key.x509.signer vmlinux-gdb.py
|
|
|
|
# clean - Delete most, but leave enough to build external modules
|
|
#
|
|
clean: rm-dirs := $(CLEAN_DIRS)
|
|
clean: rm-files := $(CLEAN_FILES)
|
|
clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
|
|
|
|
PHONY += $(clean-dirs) clean archclean vmlinuxclean
|
|
$(clean-dirs):
|
|
$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
|
|
|
|
vmlinuxclean:
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
|
|
$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
|
|
|
|
clean: archclean vmlinuxclean
|
|
|
|
# mrproper - Delete all generated files, including .config
|
|
#
|
|
mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
|
|
mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
|
|
mrproper-dirs := $(addprefix _mrproper_,scripts)
|
|
|
|
PHONY += $(mrproper-dirs) mrproper archmrproper
|
|
$(mrproper-dirs):
|
|
$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
|
|
|
|
mrproper: clean archmrproper $(mrproper-dirs)
|
|
$(call cmd,rmdirs)
|
|
$(call cmd,rmfiles)
|
|
|
|
# distclean
|
|
#
|
|
PHONY += distclean
|
|
|
|
distclean: mrproper
|
|
@find $(srctree) $(RCS_FIND_IGNORE) \
|
|
\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
|
|
-o -name '*.bak' -o -name '#*#' -o -name '*%' \
|
|
-o -name 'core' \) \
|
|
-type f -print | xargs rm -f
|
|
|
|
|
|
# Packaging of the kernel to various formats
|
|
# ---------------------------------------------------------------------------
|
|
# rpm target kept for backward compatibility
|
|
package-dir := scripts/package
|
|
|
|
%src-pkg: FORCE
|
|
$(Q)$(MAKE) $(build)=$(package-dir) $@
|
|
%pkg: include/config/kernel.release FORCE
|
|
$(Q)$(MAKE) $(build)=$(package-dir) $@
|
|
rpm: include/config/kernel.release FORCE
|
|
$(Q)$(MAKE) $(build)=$(package-dir) $@
|
|
|
|
|
|
# Brief documentation of the typical targets used
|
|
# ---------------------------------------------------------------------------
|
|
|
|
boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
|
|
boards := $(sort $(notdir $(boards)))
|
|
board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
|
|
board-dirs := $(sort $(notdir $(board-dirs:/=)))
|
|
|
|
PHONY += help
|
|
help:
|
|
@echo 'Cleaning targets:'
|
|
@echo ' clean - Remove most generated files but keep the config and'
|
|
@echo ' enough build support to build external modules'
|
|
@echo ' mrproper - Remove all generated files + config + various backup files'
|
|
@echo ' distclean - mrproper + remove editor backup and patch files'
|
|
@echo ''
|
|
@echo 'Configuration targets:'
|
|
@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
|
|
@echo ''
|
|
@echo 'Other generic targets:'
|
|
@echo ' all - Build all targets marked with [*]'
|
|
@echo '* vmlinux - Build the bare kernel'
|
|
@echo '* modules - Build all modules'
|
|
@echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
|
|
@echo ' dir/ - Build all files in dir and below'
|
|
@echo ' dir/file.[ois] - Build specified target only'
|
|
@echo ' dir/file.ll - Build the LLVM assembly file'
|
|
@echo ' (requires compiler support for LLVM assembly generation)'
|
|
@echo ' dir/file.lst - Build specified mixed source/assembly target only'
|
|
@echo ' (requires a recent binutils and recent build (System.map))'
|
|
@echo ' dir/file.ko - Build module including final link'
|
|
@echo ' modules_prepare - Set up for building external modules'
|
|
@echo ' tags/TAGS - Generate tags file for editors'
|
|
@echo ' cscope - Generate cscope index'
|
|
@echo ' gtags - Generate GNU GLOBAL index'
|
|
@echo ' kernelrelease - Output the release version string (use with make -s)'
|
|
@echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
|
|
@echo ' image_name - Output the image name (use with make -s)'
|
|
@echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
|
|
echo ' (default: $(INSTALL_HDR_PATH))'; \
|
|
echo ''
|
|
@echo 'Static analysers:'
|
|
@echo ' checkstack - Generate a list of stack hogs'
|
|
@echo ' namespacecheck - Name space analysis on compiled kernel'
|
|
@echo ' versioncheck - Sanity check on version.h usage'
|
|
@echo ' includecheck - Check for duplicate included header files'
|
|
@echo ' export_report - List the usages of all exported symbols'
|
|
@echo ' headers_check - Sanity check on exported headers'
|
|
@echo ' headerdep - Detect inclusion cycles in headers'
|
|
@$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
|
|
@echo ''
|
|
@echo 'Kernel selftest:'
|
|
@echo ' kselftest - Build and run kernel selftest (run as root)'
|
|
@echo ' Build, install, and boot kernel before'
|
|
@echo ' running kselftest on it'
|
|
@echo ' kselftest-clean - Remove all generated kselftest files'
|
|
@echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing'
|
|
@echo ' .config.'
|
|
@echo ''
|
|
@echo 'Userspace tools targets:'
|
|
@echo ' use "make tools/help"'
|
|
@echo ' or "cd tools; make help"'
|
|
@echo ''
|
|
@echo 'Kernel packaging:'
|
|
@$(MAKE) $(build)=$(package-dir) help
|
|
@echo ''
|
|
@echo 'Documentation targets:'
|
|
@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
|
|
@echo ''
|
|
@echo 'Architecture specific targets ($(SRCARCH)):'
|
|
@$(if $(archhelp),$(archhelp),\
|
|
echo ' No architecture specific help defined for $(SRCARCH)')
|
|
@echo ''
|
|
@$(if $(boards), \
|
|
$(foreach b, $(boards), \
|
|
printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
|
|
echo '')
|
|
@$(if $(board-dirs), \
|
|
$(foreach b, $(board-dirs), \
|
|
printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
|
|
printf " %-16s - Show all of the above\\n" help-boards; \
|
|
echo '')
|
|
|
|
@echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
|
|
@echo ' make V=2 [targets] 2 => give reason for rebuild of target'
|
|
@echo ' make O=dir [targets] Locate all output files in "dir", including .config'
|
|
@echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
|
|
@echo ' make C=2 [targets] Force check of all c source with $$CHECK'
|
|
@echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
|
|
@echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
|
|
@echo ' 1: warnings which may be relevant and do not occur too often'
|
|
@echo ' 2: warnings which occur quite often but may still be relevant'
|
|
@echo ' 3: more obscure warnings, can most likely be ignored'
|
|
@echo ' Multiple levels can be combined with W=12 or W=123'
|
|
@echo ''
|
|
@echo 'Execute "make" or "make all" to build all targets marked with [*] '
|
|
@echo 'For further info see the ./README file'
|
|
|
|
|
|
help-board-dirs := $(addprefix help-,$(board-dirs))
|
|
|
|
help-boards: $(help-board-dirs)
|
|
|
|
boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
|
|
|
|
$(help-board-dirs): help-%:
|
|
@echo 'Architecture specific targets ($(SRCARCH) $*):'
|
|
@$(if $(boards-per-dir), \
|
|
$(foreach b, $(boards-per-dir), \
|
|
printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
|
|
echo '')
|
|
|
|
|
|
# Documentation targets
|
|
# ---------------------------------------------------------------------------
|
|
DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs linkcheckdocs
|
|
PHONY += $(DOC_TARGETS)
|
|
$(DOC_TARGETS): scripts_basic FORCE
|
|
$(Q)$(MAKE) $(build)=Documentation $@
|
|
|
|
else # KBUILD_EXTMOD
|
|
|
|
###
|
|
# External module support.
|
|
# When building external modules the kernel used as basis is considered
|
|
# read-only, and no consistency checks are made and the make
|
|
# system is not used on the basis kernel. If updates are required
|
|
# in the basis kernel ordinary make commands (without M=...) must
|
|
# be used.
|
|
#
|
|
# The following are the only valid targets when building external
|
|
# modules.
|
|
# make M=dir clean Delete all automatically generated files
|
|
# make M=dir modules Make all modules in specified dir
|
|
# make M=dir Same as 'make M=dir modules'
|
|
# make M=dir modules_install
|
|
# Install the modules built in the module directory
|
|
# Assumes install directory is already created
|
|
|
|
# We are always building modules
|
|
KBUILD_MODULES := 1
|
|
PHONY += crmodverdir
|
|
crmodverdir:
|
|
$(cmd_crmodverdir)
|
|
|
|
PHONY += $(objtree)/Module.symvers
|
|
$(objtree)/Module.symvers:
|
|
@test -e $(objtree)/Module.symvers || ( \
|
|
echo; \
|
|
echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
|
|
echo " is missing; modules will have no dependencies and modversions."; \
|
|
echo )
|
|
|
|
module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
|
|
PHONY += $(module-dirs) modules
|
|
$(module-dirs): crmodverdir $(objtree)/Module.symvers
|
|
$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
|
|
|
|
modules: $(module-dirs)
|
|
@$(kecho) ' Building modules, stage 2.';
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
|
|
|
|
PHONY += modules_install
|
|
modules_install: _emodinst_ _emodinst_post
|
|
|
|
install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
|
|
PHONY += _emodinst_
|
|
_emodinst_:
|
|
$(Q)mkdir -p $(MODLIB)/$(install-dir)
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
|
|
|
|
PHONY += _emodinst_post
|
|
_emodinst_post: _emodinst_
|
|
$(call cmd,depmod)
|
|
|
|
clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
|
|
|
|
PHONY += $(clean-dirs) clean
|
|
$(clean-dirs):
|
|
$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
|
|
|
|
clean: rm-dirs := $(MODVERDIR)
|
|
clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
|
|
|
|
PHONY += help
|
|
help:
|
|
@echo ' Building external modules.'
|
|
@echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
|
|
@echo ''
|
|
@echo ' modules - default target, build the module(s)'
|
|
@echo ' modules_install - install the module'
|
|
@echo ' clean - remove generated files in module directory only'
|
|
@echo ''
|
|
|
|
# Dummies...
|
|
PHONY += prepare scripts
|
|
prepare: ;
|
|
scripts: ;
|
|
endif # KBUILD_EXTMOD
|
|
|
|
clean: $(clean-dirs)
|
|
$(call cmd,rmdirs)
|
|
$(call cmd,rmfiles)
|
|
@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
|
|
\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
|
|
-o -name '*.ko.*' \
|
|
-o -name '*.dwo' \
|
|
-o -name '*.su' \
|
|
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
|
|
-o -name '*.symtypes' -o -name 'modules.order' \
|
|
-o -name modules.builtin -o -name '.tmp_*.o.*' \
|
|
-o -name '*.c.[012]*.*' \
|
|
-o -name '*.ll' \
|
|
-o -name '*.gcno' \) -type f -print | xargs rm -f
|
|
|
|
# Generate tags for editors
|
|
# ---------------------------------------------------------------------------
|
|
quiet_cmd_tags = GEN $@
|
|
cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
|
|
|
|
tags TAGS cscope gtags: FORCE
|
|
$(call cmd,tags)
|
|
|
|
# Scripts to check various things for consistency
|
|
# ---------------------------------------------------------------------------
|
|
|
|
PHONY += includecheck versioncheck coccicheck namespacecheck export_report
|
|
|
|
includecheck:
|
|
find $(srctree)/* $(RCS_FIND_IGNORE) \
|
|
-name '*.[hcS]' -type f -print | sort \
|
|
| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
|
|
|
|
versioncheck:
|
|
find $(srctree)/* $(RCS_FIND_IGNORE) \
|
|
-name '*.[hcS]' -type f -print | sort \
|
|
| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
|
|
|
|
coccicheck:
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
|
|
|
|
namespacecheck:
|
|
$(PERL) $(srctree)/scripts/namespace.pl
|
|
|
|
export_report:
|
|
$(PERL) $(srctree)/scripts/export_report.pl
|
|
|
|
endif #ifeq ($(config-targets),1)
|
|
endif #ifeq ($(mixed-targets),1)
|
|
|
|
PHONY += checkstack kernelrelease kernelversion image_name
|
|
|
|
# UML needs a little special treatment here. It wants to use the host
|
|
# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
|
|
# else wants $(ARCH), including people doing cross-builds, which means
|
|
# that $(SUBARCH) doesn't work here.
|
|
ifeq ($(ARCH), um)
|
|
CHECKSTACK_ARCH := $(SUBARCH)
|
|
else
|
|
CHECKSTACK_ARCH := $(ARCH)
|
|
endif
|
|
checkstack:
|
|
$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
|
|
$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
|
|
|
|
kernelrelease:
|
|
@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
|
|
|
|
kernelversion:
|
|
@echo $(KERNELVERSION)
|
|
|
|
image_name:
|
|
@echo $(KBUILD_IMAGE)
|
|
|
|
# Clear a bunch of variables before executing the submake
|
|
tools/: FORCE
|
|
$(Q)mkdir -p $(objtree)/tools
|
|
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/
|
|
|
|
tools/%: FORCE
|
|
$(Q)mkdir -p $(objtree)/tools
|
|
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $*
|
|
|
|
# Single targets
|
|
# ---------------------------------------------------------------------------
|
|
# Single targets are compatible with:
|
|
# - build with mixed source and output
|
|
# - build with separate output dir 'make O=...'
|
|
# - external modules
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|
#
|
|
# target-dir => where to store outputfile
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|
# build-dir => directory in kernel source tree to use
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
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|
build-dir = $(patsubst %/,%,$(dir $@))
|
|
target-dir = $(dir $@)
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|
else
|
|
zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
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|
build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
|
|
target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
|
|
endif
|
|
|
|
%.s: %.c prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
%.i: %.c prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
%.o: %.c prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
%.lst: %.c prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
%.s: %.S prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
%.o: %.S prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
%.symtypes: %.c prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
%.ll: %.c prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
|
|
# Modules
|
|
/: prepare scripts FORCE
|
|
$(cmd_crmodverdir)
|
|
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
|
|
$(build)=$(build-dir)
|
|
# Make sure the latest headers are built for Documentation
|
|
Documentation/ samples/: headers_install
|
|
%/: prepare scripts FORCE
|
|
$(cmd_crmodverdir)
|
|
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
|
|
$(build)=$(build-dir)
|
|
%.ko: prepare scripts FORCE
|
|
$(cmd_crmodverdir)
|
|
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
|
|
$(build)=$(build-dir) $(@:.ko=.o)
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
|
|
|
|
# FIXME Should go into a make.lib or something
|
|
# ===========================================================================
|
|
|
|
quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
|
|
cmd_rmdirs = rm -rf $(rm-dirs)
|
|
|
|
quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
|
|
cmd_rmfiles = rm -f $(rm-files)
|
|
|
|
# Run depmod only if we have System.map and depmod is executable
|
|
quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
|
|
cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
|
|
$(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
|
|
|
|
# Create temporary dir for module support files
|
|
# clean it up only when building all modules
|
|
cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
|
|
$(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
|
|
|
|
# read all saved command lines
|
|
|
|
targets := $(wildcard $(sort $(targets)))
|
|
cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
|
|
|
|
ifneq ($(cmd_files),)
|
|
$(cmd_files): ; # Do not try to update included dependency files
|
|
include $(cmd_files)
|
|
endif
|
|
|
|
endif # skip-makefile
|
|
|
|
PHONY += FORCE
|
|
FORCE:
|
|
|
|
# Declare the contents of the .PHONY variable as phony. We keep that
|
|
# information in a variable so we can use it in if_changed and friends.
|
|
.PHONY: $(PHONY)
|