mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-13 07:44:00 +08:00
0eb3412a68
- suppress sparse warnings about unknown attributes - fix typos and stale comments - fix build error of arch/sh - fix wrong use of ld-option vs cc-ldoption - remove redundant GCC_PLUGINS_CFLAGS assignment - fix another memory leak of Kconfig - fix line number in error messages of Kconfig - do not write confusing CONFIG_DEFCONFIG_LIST out to .config - add xstrdup() to Kconfig to handle memory shortage errors - show also a Debian package name if ncurses is missing -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJamiV5AAoJED2LAQed4NsGgbUQAInk9+SPBtulpK1HayDoYrC6 6LYQWjdO89jbKAaQFsDQ0ZC5HwPgafX18HWunJ67Cs6kunLYTMJLu8cHr5rRHrv1 B+ceAkMe5EE62Bmju35qX54BSgcPyWt9jFloFmdzOG7nR7D+C9DUx2WZnF3Kd0Gb XPw8R4u2EEKGOMYh5PwYFP5mjhfWMijg6OZaAdcV4E/fSXiwSlDjwuVY1ymhsEAn OalDNcJ5+Foe9ADy5yLEna0Jlj8j8UMGPRzNErvL2CxZP2CSfpKfuXJABig5x8rk ZXULN6w7nIN/dpUkPgkTYgF6behUuSUPj+7xBDWbVjRQLMMy6bI65s5hylBzYAMy tB3hKnpZtrrJNc00XQWLY18b03YzLv5wW0CK8jmRJPLWDE8znb8aMqxwtfJKhfa+ cW5v5KzQm4ercArSy983jj4FJD6ZuQf1lqAARD4vxX5kK9oy+7oJvfzmwrlh1U2c dk/3VKF2AjUDDdzxq+zgJIWFR1MMTxFKqL95CsdaFEUMRXr80a8XBNYP07R4l3qB y2zUsZZi7Ad363MkohBCEBdw1yPtHupRETr3xdQlUDh0ZQj94TXB6lX2SaY4v1NS J3eqTl8t/RHboS5kbPMz8MduO4otH/ZxYDd0uMKA5c/v/9LkD9y+AIpndswk4jcN /uKkw5sSRgO+9VfsTqed =sr4l -----END PGP SIGNATURE----- Merge tag 'kbuild-fixes-v4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild fixes from Masahiro Yamada: - suppress sparse warnings about unknown attributes - fix typos and stale comments - fix build error of arch/sh - fix wrong use of ld-option vs cc-ldoption - remove redundant GCC_PLUGINS_CFLAGS assignment - fix another memory leak of Kconfig - fix line number in error messages of Kconfig - do not write confusing CONFIG_DEFCONFIG_LIST out to .config - add xstrdup() to Kconfig to handle memory shortage errors - show also a Debian package name if ncurses is missing * tag 'kbuild-fixes-v4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: MAINTAINERS: take over Kconfig maintainership kconfig: fix line number in recursive inclusion error message Coccinelle: memdup: Fix typo in warning messages kconfig: Update ncurses package names for menuconfig kbuild/kallsyms: trivial typo fix kbuild: test --build-id linker flag by ld-option instead of cc-ldoption kbuild: drop superfluous GCC_PLUGINS_CFLAGS assignment kconfig: Don't leak choice names during parsing sh: fix build error for empty CONFIG_BUILTIN_DTB_SOURCE kconfig: set SYMBOL_AUTO to the symbol marked with defconfig_list kconfig: add xstrdup() helper kbuild: disable sparse warnings about unknown attributes Makefile: Fix lying comment re. silentoldconfig
1769 lines
60 KiB
Makefile
1769 lines
60 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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VERSION = 4
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PATCHLEVEL = 16
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SUBLEVEL = 0
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EXTRAVERSION = -rc3
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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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# 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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# 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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# 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
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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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# Beautify output
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# ---------------------------------------------------------------------------
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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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#
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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 $@ :<
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#
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# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
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# If KBUILD_VERBOSE equals 1 then the above command is displayed.
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#
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# To put more focus on warnings, be less verbose as default
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# Use 'make V=1' to see the full commands
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ifeq ("$(origin V)", "command line")
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KBUILD_VERBOSE = $(V)
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endif
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ifndef KBUILD_VERBOSE
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KBUILD_VERBOSE = 0
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endif
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ifeq ($(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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# 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 --%,$(MAKEFLAGS))),)
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quiet=silent_
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tools_silent=s
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endif
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export quiet Q KBUILD_VERBOSE
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# kbuild supports saving output files in a separate directory.
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# To locate output files in a separate directory two syntaxes are supported.
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# In both cases the working directory must be the root of the kernel src.
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# 1) O=
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# Use "make O=dir/to/store/output/files/"
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#
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# 2) Set KBUILD_OUTPUT
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# Set the environment variable KBUILD_OUTPUT to point to the directory
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# where the output files shall be placed.
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# export KBUILD_OUTPUT=dir/to/store/output/files/
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# make
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#
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# The O= assignment takes precedence over the KBUILD_OUTPUT environment
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# variable.
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# KBUILD_SRC is not intended to be used by the regular user (for now),
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# it is set on invocation of make with KBUILD_OUTPUT or O= specified.
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ifeq ($(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?
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ifeq ("$(origin O)", "command line")
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KBUILD_OUTPUT := $(O)
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endif
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# Cancel implicit rules on top Makefile
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$(CURDIR)/Makefile Makefile: ;
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ifneq ($(words $(subst :, ,$(CURDIR))), 1)
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$(error main directory cannot contain spaces nor colons)
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endif
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ifneq ($(KBUILD_OUTPUT),)
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# check that the output directory actually exists
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saved-output := $(KBUILD_OUTPUT)
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KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
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&& pwd)
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$(if $(KBUILD_OUTPUT),, \
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$(error failed to create output directory "$(saved-output)"))
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PHONY += $(MAKECMDGOALS) sub-make
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$(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
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skip-makefile := 1
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endif # ifneq ($(KBUILD_OUTPUT),)
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endif # ifeq ($(KBUILD_SRC),)
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# We process the rest of the Makefile if this is the final invocation of make
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ifeq ($(skip-makefile),)
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# Do not print "Entering directory ...",
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# but we want to display it when entering to the output directory
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# so that IDEs/editors are able to understand relative filenames.
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MAKEFLAGS += --no-print-directory
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# Call a source code checker (by default, "sparse") as part of the
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# C compilation.
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#
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# Use 'make C=1' to enable checking of only re-compiled files.
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# Use 'make C=2' to enable checking of *all* source files, regardless
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# of whether they are re-compiled or not.
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#
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# See the file "Documentation/dev-tools/sparse.rst" for more details,
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# including where to get the "sparse" utility.
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ifeq ("$(origin C)", "command line")
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KBUILD_CHECKSRC = $(C)
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endif
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ifndef KBUILD_CHECKSRC
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KBUILD_CHECKSRC = 0
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endif
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# Use make M=dir to specify directory of external module to build
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# Old syntax make ... SUBDIRS=$PWD is still supported
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# Setting the environment variable KBUILD_EXTMOD take precedence
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ifdef SUBDIRS
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KBUILD_EXTMOD ?= $(SUBDIRS)
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endif
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ifeq ("$(origin M)", "command line")
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KBUILD_EXTMOD := $(M)
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endif
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ifeq ($(KBUILD_SRC),)
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# building in the source tree
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srctree := .
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else
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ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
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# building in a subdirectory of the source tree
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srctree := ..
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else
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srctree := $(KBUILD_SRC)
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endif
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endif
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export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC
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objtree := .
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src := $(srctree)
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obj := $(objtree)
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VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
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export srctree objtree VPATH
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# To make sure we do not include .config for any of the *config targets
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# catch them early, and hand them over to scripts/kconfig/Makefile
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# It is allowed to specify more targets when calling make, including
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# mixing *config targets and build targets.
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# For example 'make oldconfig all'.
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# Detect when mixed targets is specified, and make a second invocation
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# of make so .config is not included in this case either (for *config).
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version_h := include/generated/uapi/linux/version.h
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old_version_h := include/linux/version.h
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no-dot-config-targets := clean mrproper distclean \
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cscope gtags TAGS tags help% %docs check% coccicheck \
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$(version_h) headers_% archheaders archscripts \
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kernelversion %src-pkg
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config-targets := 0
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mixed-targets := 0
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dot-config := 1
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ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
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ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
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dot-config := 0
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endif
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endif
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ifeq ($(KBUILD_EXTMOD),)
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ifneq ($(filter config %config,$(MAKECMDGOALS)),)
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config-targets := 1
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ifneq ($(words $(MAKECMDGOALS)),1)
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mixed-targets := 1
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endif
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endif
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endif
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# install and modules_install need also be processed one by one
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ifneq ($(filter install,$(MAKECMDGOALS)),)
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ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
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mixed-targets := 1
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endif
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endif
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ifeq ($(mixed-targets),1)
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# ===========================================================================
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# We're called with mixed targets (*config and build targets).
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# Handle them one by one.
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PHONY += $(MAKECMDGOALS) __build_one_by_one
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$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
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@:
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__build_one_by_one:
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$(Q)set -e; \
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for i in $(MAKECMDGOALS); do \
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$(MAKE) -f $(srctree)/Makefile $$i; \
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done
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else
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# We need some generic definitions (do not try to remake the file).
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scripts/Kbuild.include: ;
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include scripts/Kbuild.include
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# Read KERNELRELEASE from include/config/kernel.release (if it exists)
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KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
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KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
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export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
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# SUBARCH tells the usermode build what the underlying arch is. That is set
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# first, and if a usermode build is happening, the "ARCH=um" on the command
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# line overrides the setting of ARCH below. If a native build is happening,
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# then ARCH is assigned, getting whatever value it gets normally, and
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# SUBARCH is subsequently ignored.
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SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
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-e s/sun4u/sparc64/ \
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-e s/arm.*/arm/ -e s/sa110/arm/ \
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-e s/s390x/s390/ -e s/parisc64/parisc/ \
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-e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
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-e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \
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-e s/riscv.*/riscv/)
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# Cross compiling and selecting different set of gcc/bin-utils
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# ---------------------------------------------------------------------------
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#
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# When performing cross compilation for other architectures ARCH shall be set
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# to the target architecture. (See arch/* for the possibilities).
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# ARCH can be set during invocation of make:
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# make ARCH=ia64
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# Another way is to have ARCH set in the environment.
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# The default ARCH is the host where make is executed.
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# CROSS_COMPILE specify the prefix used for all executables used
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# during compilation. Only gcc and related bin-utils executables
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# are prefixed with $(CROSS_COMPILE).
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# CROSS_COMPILE can be set on the command line
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# make CROSS_COMPILE=ia64-linux-
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# Alternatively CROSS_COMPILE can be set in the environment.
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# A third alternative is to store a setting in .config so that plain
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# "make" in the configured kernel build directory always uses that.
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# Default value for CROSS_COMPILE is not to prefix executables
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# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
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ARCH ?= $(SUBARCH)
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CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
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# Architecture as present in compile.h
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UTS_MACHINE := $(ARCH)
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SRCARCH := $(ARCH)
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# Additional ARCH settings for x86
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ifeq ($(ARCH),i386)
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SRCARCH := x86
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endif
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ifeq ($(ARCH),x86_64)
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SRCARCH := x86
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endif
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# Additional ARCH settings for sparc
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ifeq ($(ARCH),sparc32)
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SRCARCH := sparc
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endif
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ifeq ($(ARCH),sparc64)
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SRCARCH := sparc
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endif
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# Additional ARCH settings for sh
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ifeq ($(ARCH),sh64)
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SRCARCH := sh
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endif
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# Additional ARCH settings for tile
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ifeq ($(ARCH),tilepro)
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SRCARCH := tile
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endif
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ifeq ($(ARCH),tilegx)
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SRCARCH := tile
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endif
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KCONFIG_CONFIG ?= .config
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export KCONFIG_CONFIG
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# SHELL used by kbuild
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CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
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else if [ -x /bin/bash ]; then echo /bin/bash; \
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else echo sh; fi ; fi)
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HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS)
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HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS)
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HOST_LFS_LIBS := $(shell getconf LFS_LIBS)
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HOSTCC = gcc
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HOSTCXX = g++
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HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
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-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS)
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HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
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HOSTLDFLAGS := $(HOST_LFS_LDFLAGS)
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HOST_LOADLIBES := $(HOST_LFS_LIBS)
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# Make variables (CC, etc...)
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AS = $(CROSS_COMPILE)as
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LD = $(CROSS_COMPILE)ld
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CC = $(CROSS_COMPILE)gcc
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CPP = $(CC) -E
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AR = $(CROSS_COMPILE)ar
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NM = $(CROSS_COMPILE)nm
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STRIP = $(CROSS_COMPILE)strip
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OBJCOPY = $(CROSS_COMPILE)objcopy
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OBJDUMP = $(CROSS_COMPILE)objdump
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LEX = flex
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YACC = bison
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AWK = awk
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GENKSYMS = scripts/genksyms/genksyms
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INSTALLKERNEL := installkernel
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DEPMOD = /sbin/depmod
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PERL = perl
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PYTHON = python
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CHECK = sparse
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CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
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-Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
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NOSTDINC_FLAGS =
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CFLAGS_MODULE =
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AFLAGS_MODULE =
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LDFLAGS_MODULE =
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CFLAGS_KERNEL =
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AFLAGS_KERNEL =
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LDFLAGS_vmlinux =
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|
|
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# Use USERINCLUDE when you must reference the UAPI directories only.
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USERINCLUDE := \
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-I$(srctree)/arch/$(SRCARCH)/include/uapi \
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-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
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|
-I$(srctree)/include/uapi \
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|
-I$(objtree)/include/generated/uapi \
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|
-include $(srctree)/include/linux/kconfig.h
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|
|
|
# Use LINUXINCLUDE when you must reference the include/ directory.
|
|
# Needed to be compatible with the O= option
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|
LINUXINCLUDE := \
|
|
-I$(srctree)/arch/$(SRCARCH)/include \
|
|
-I$(objtree)/arch/$(SRCARCH)/include/generated \
|
|
$(if $(KBUILD_SRC), -I$(srctree)/include) \
|
|
-I$(objtree)/include \
|
|
$(USERINCLUDE)
|
|
|
|
KBUILD_AFLAGS := -D__ASSEMBLY__
|
|
KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
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|
-fno-strict-aliasing -fno-common -fshort-wchar \
|
|
-Werror-implicit-function-declaration \
|
|
-Wno-format-security \
|
|
-std=gnu89
|
|
KBUILD_CPPFLAGS := -D__KERNEL__
|
|
KBUILD_AFLAGS_KERNEL :=
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|
KBUILD_CFLAGS_KERNEL :=
|
|
KBUILD_AFLAGS_MODULE := -DMODULE
|
|
KBUILD_CFLAGS_MODULE := -DMODULE
|
|
KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
|
|
GCC_PLUGINS_CFLAGS :=
|
|
|
|
export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
|
|
export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES
|
|
export MAKE LEX YACC 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
|
|
export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE 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) $(PATCHLEVEL)
|
|
endif
|
|
|
|
ifeq ($(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)
|
|
endif
|
|
|
|
RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
|
|
RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
|
|
RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
|
|
export RETPOLINE_CFLAGS
|
|
|
|
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 $@
|
|
|
|
else
|
|
# ===========================================================================
|
|
# Build targets only - this includes vmlinux, arch specific targets, clean
|
|
# targets and others. In general all targets except *config targets.
|
|
|
|
# If building an external module we do not care about the all: rule
|
|
# but instead _all depend on modules
|
|
PHONY += all
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
_all: all
|
|
else
|
|
_all: modules
|
|
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
|
|
|
|
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: ;
|
|
|
|
# The actual configuration files used during the build are stored in
|
|
# include/generated/ and include/config/. Update them if .config is newer than
|
|
# include/config/auto.conf (which mirrors .config).
|
|
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
|
|
|
|
KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
|
|
KBUILD_AFLAGS += $(call cc-option,-fno-PIE)
|
|
CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,)
|
|
export CFLAGS_GCOV CFLAGS_KCOV
|
|
|
|
# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
|
|
# values of the respective KBUILD_* variables
|
|
ARCH_CPPFLAGS :=
|
|
ARCH_AFLAGS :=
|
|
ARCH_CFLAGS :=
|
|
include arch/$(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 += $(call cc-option,--param=allow-store-data-races=0)
|
|
|
|
# check for 'asm goto'
|
|
ifeq ($(call shell-cached,$(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.kcov
|
|
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_AUTO
|
|
stackp-flag := $(call cc-option,-fstack-protector-strong,$(call cc-option,-fstack-protector))
|
|
stackp-name := AUTO
|
|
else
|
|
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
|
|
# If either there is no stack protector for this architecture or
|
|
# CONFIG_CC_STACKPROTECTOR_NONE is selected, we're done, and $(stackp-name)
|
|
# is empty, skipping all remaining stack protector tests.
|
|
#
|
|
# Force off for distro compilers that enable stack protector by default.
|
|
KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
|
|
endif
|
|
endif
|
|
endif
|
|
# Find arch-specific stack protector compiler sanity-checking script.
|
|
ifdef stackp-name
|
|
ifneq ($(stackp-flag),)
|
|
stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
|
|
stackp-check := $(wildcard $(stackp-path))
|
|
# If the wildcard test matches a test script, run it to check functionality.
|
|
ifdef stackp-check
|
|
ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
|
|
stackp-broken := y
|
|
endif
|
|
endif
|
|
ifndef stackp-broken
|
|
# If the stack protector is functional, enable code that depends on it.
|
|
KBUILD_CPPFLAGS += -DCONFIG_CC_STACKPROTECTOR
|
|
# Either we've already detected the flag (for AUTO) or we'll fail the
|
|
# build in the prepare-compiler-check rule (for specific flag).
|
|
KBUILD_CFLAGS += $(stackp-flag)
|
|
else
|
|
# We have to make sure stack protector is unconditionally disabled if
|
|
# the compiler is broken (in case we're going to continue the build in
|
|
# AUTO mode).
|
|
KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
|
|
endif
|
|
endif
|
|
endif
|
|
|
|
ifeq ($(cc-name),clang)
|
|
KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
|
|
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)
|
|
endif
|
|
|
|
KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
|
|
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 $(call shell-cached,$(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)
|
|
|
|
# Make sure -fstack-check isn't enabled (like gentoo apparently did)
|
|
KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,)
|
|
|
|
# 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 := $(call ld-option, --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_UNWINDER_ORC
|
|
$(error "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=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) $(build)=$@ need-builtin=1
|
|
|
|
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
|
|
|
|
# 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
|
|
|
|
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
|
|
# Warn about CONFIG_CC_STACKPROTECTOR_AUTO having found no option.
|
|
ifeq ($(stackp-flag),)
|
|
@echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
|
|
Compiler does not support any known stack-protector >&2
|
|
else
|
|
# Fail if specifically requested stack protector is missing.
|
|
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
|
|
endif
|
|
# Make sure compiler does not have buggy stack-protector support. If a
|
|
# specific stack-protector was requested, fail the build, otherwise warn.
|
|
ifdef stackp-broken
|
|
ifeq ($(stackp-name),AUTO)
|
|
@echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
|
|
$(stackp-flag) available but compiler is broken: disabling >&2
|
|
else
|
|
@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-$(SRCARCH)
|
|
hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), 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/$(SRCARCH)/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/$(SRCARCH)/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/$(SRCARCH)/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 \
|
|
Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
|
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signing_key.pem signing_key.priv signing_key.x509 \
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x509.genkey extra_certificates signing_key.x509.keyid \
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signing_key.x509.signer vmlinux-gdb.py
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# clean - Delete most, but leave enough to build external modules
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#
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clean: rm-dirs := $(CLEAN_DIRS)
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clean: rm-files := $(CLEAN_FILES)
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clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
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PHONY += $(clean-dirs) clean archclean vmlinuxclean
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$(clean-dirs):
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$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
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vmlinuxclean:
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$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
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$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
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clean: archclean vmlinuxclean
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# mrproper - Delete all generated files, including .config
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#
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mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
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mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
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mrproper-dirs := $(addprefix _mrproper_,scripts)
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PHONY += $(mrproper-dirs) mrproper archmrproper
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$(mrproper-dirs):
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$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
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mrproper: clean archmrproper $(mrproper-dirs)
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$(call cmd,rmdirs)
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$(call cmd,rmfiles)
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# distclean
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#
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PHONY += distclean
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distclean: mrproper
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@find $(srctree) $(RCS_FIND_IGNORE) \
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\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
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-o -name '*.bak' -o -name '#*#' -o -name '*%' \
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-o -name 'core' \) \
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-type f -print | xargs rm -f
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# Packaging of the kernel to various formats
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# ---------------------------------------------------------------------------
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# rpm target kept for backward compatibility
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package-dir := scripts/package
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%src-pkg: FORCE
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$(Q)$(MAKE) $(build)=$(package-dir) $@
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%pkg: include/config/kernel.release FORCE
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$(Q)$(MAKE) $(build)=$(package-dir) $@
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rpm: rpm-pkg
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@echo " WARNING: \"rpm\" target will be removed after Linux 4.18"
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@echo " Please use \"rpm-pkg\" instead."
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# Brief documentation of the typical targets used
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# ---------------------------------------------------------------------------
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boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
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boards := $(sort $(notdir $(boards)))
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board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
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board-dirs := $(sort $(notdir $(board-dirs:/=)))
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PHONY += help
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help:
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@echo 'Cleaning targets:'
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@echo ' clean - Remove most generated files but keep the config and'
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@echo ' enough build support to build external modules'
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@echo ' mrproper - Remove all generated files + config + various backup files'
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@echo ' distclean - mrproper + remove editor backup and patch files'
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@echo ''
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@echo 'Configuration targets:'
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@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
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@echo ''
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@echo 'Other generic targets:'
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@echo ' all - Build all targets marked with [*]'
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@echo '* vmlinux - Build the bare kernel'
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@echo '* modules - Build all modules'
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@echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
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@echo ' dir/ - Build all files in dir and below'
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@echo ' dir/file.[ois] - Build specified target only'
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@echo ' dir/file.ll - Build the LLVM assembly file'
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@echo ' (requires compiler support for LLVM assembly generation)'
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@echo ' dir/file.lst - Build specified mixed source/assembly target only'
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@echo ' (requires a recent binutils and recent build (System.map))'
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@echo ' dir/file.ko - Build module including final link'
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@echo ' modules_prepare - Set up for building external modules'
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@echo ' tags/TAGS - Generate tags file for editors'
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@echo ' cscope - Generate cscope index'
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@echo ' gtags - Generate GNU GLOBAL index'
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@echo ' kernelrelease - Output the release version string (use with make -s)'
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@echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
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@echo ' image_name - Output the image name (use with make -s)'
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@echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
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echo ' (default: $(INSTALL_HDR_PATH))'; \
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echo ''
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@echo 'Static analysers:'
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@echo ' checkstack - Generate a list of stack hogs'
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@echo ' namespacecheck - Name space analysis on compiled kernel'
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@echo ' versioncheck - Sanity check on version.h usage'
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@echo ' includecheck - Check for duplicate included header files'
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@echo ' export_report - List the usages of all exported symbols'
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@echo ' headers_check - Sanity check on exported headers'
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@echo ' headerdep - Detect inclusion cycles in headers'
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@echo ' coccicheck - Check with Coccinelle'
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@echo ''
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@echo 'Kernel selftest:'
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@echo ' kselftest - Build and run kernel selftest (run as root)'
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@echo ' Build, install, and boot kernel before'
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@echo ' running kselftest on it'
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@echo ' kselftest-clean - Remove all generated kselftest files'
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@echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing'
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@echo ' .config.'
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@echo ''
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@echo 'Userspace tools targets:'
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@echo ' use "make tools/help"'
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@echo ' or "cd tools; make help"'
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@echo ''
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@echo 'Kernel packaging:'
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@$(MAKE) $(build)=$(package-dir) help
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@echo ''
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@echo 'Documentation targets:'
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@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
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@echo ''
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@echo 'Architecture specific targets ($(SRCARCH)):'
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@$(if $(archhelp),$(archhelp),\
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echo ' No architecture specific help defined for $(SRCARCH)')
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@echo ''
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@$(if $(boards), \
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$(foreach b, $(boards), \
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printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
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echo '')
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@$(if $(board-dirs), \
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$(foreach b, $(board-dirs), \
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printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
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printf " %-16s - Show all of the above\\n" help-boards; \
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echo '')
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@echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
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@echo ' make V=2 [targets] 2 => give reason for rebuild of target'
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@echo ' make O=dir [targets] Locate all output files in "dir", including .config'
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@echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
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@echo ' make C=2 [targets] Force check of all c source with $$CHECK'
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@echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
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@echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
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@echo ' 1: warnings which may be relevant and do not occur too often'
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@echo ' 2: warnings which occur quite often but may still be relevant'
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@echo ' 3: more obscure warnings, can most likely be ignored'
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@echo ' Multiple levels can be combined with W=12 or W=123'
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@echo ''
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@echo 'Execute "make" or "make all" to build all targets marked with [*] '
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@echo 'For further info see the ./README file'
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help-board-dirs := $(addprefix help-,$(board-dirs))
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help-boards: $(help-board-dirs)
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boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
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$(help-board-dirs): help-%:
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@echo 'Architecture specific targets ($(SRCARCH) $*):'
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@$(if $(boards-per-dir), \
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$(foreach b, $(boards-per-dir), \
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printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
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echo '')
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# Documentation targets
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# ---------------------------------------------------------------------------
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DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
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linkcheckdocs dochelp refcheckdocs
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PHONY += $(DOC_TARGETS)
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$(DOC_TARGETS): scripts_basic FORCE
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$(Q)$(MAKE) $(build)=Documentation $@
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else # KBUILD_EXTMOD
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###
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# External module support.
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# When building external modules the kernel used as basis is considered
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# read-only, and no consistency checks are made and the make
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# system is not used on the basis kernel. If updates are required
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# in the basis kernel ordinary make commands (without M=...) must
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# be used.
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#
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# The following are the only valid targets when building external
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# modules.
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# make M=dir clean Delete all automatically generated files
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# make M=dir modules Make all modules in specified dir
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# make M=dir Same as 'make M=dir modules'
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# make M=dir modules_install
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# Install the modules built in the module directory
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# Assumes install directory is already created
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# We are always building modules
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KBUILD_MODULES := 1
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PHONY += crmodverdir
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crmodverdir:
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$(cmd_crmodverdir)
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PHONY += $(objtree)/Module.symvers
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$(objtree)/Module.symvers:
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@test -e $(objtree)/Module.symvers || ( \
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echo; \
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echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
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echo " is missing; modules will have no dependencies and modversions."; \
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echo )
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module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
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PHONY += $(module-dirs) modules
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$(module-dirs): crmodverdir $(objtree)/Module.symvers
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$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
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modules: $(module-dirs)
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@$(kecho) ' Building modules, stage 2.';
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$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
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PHONY += modules_install
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modules_install: _emodinst_ _emodinst_post
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install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
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PHONY += _emodinst_
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_emodinst_:
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$(Q)mkdir -p $(MODLIB)/$(install-dir)
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$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
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PHONY += _emodinst_post
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_emodinst_post: _emodinst_
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$(call cmd,depmod)
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clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
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PHONY += $(clean-dirs) clean
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$(clean-dirs):
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$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
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clean: rm-dirs := $(MODVERDIR)
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clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
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PHONY += help
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help:
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|
@echo ' Building external modules.'
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|
@echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
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@echo ''
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@echo ' modules - default target, build the module(s)'
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@echo ' modules_install - install the module'
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@echo ' clean - remove generated files in module directory only'
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@echo ''
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# Dummies...
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PHONY += prepare scripts
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prepare: ;
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scripts: ;
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endif # KBUILD_EXTMOD
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clean: $(clean-dirs)
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$(call cmd,rmdirs)
|
|
$(call cmd,rmfiles)
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@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
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\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
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-o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \
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-o -name '*.dwo' -o -name '*.lst' \
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-o -name '*.su' \
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-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
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-o -name '*.symtypes' -o -name 'modules.order' \
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-o -name modules.builtin -o -name '.tmp_*.o.*' \
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-o -name .cache.mk \
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|
-o -name '*.c.[012]*.*' \
|
|
-o -name '*.ll' \
|
|
-o -name '*.gcno' \) -type f -print | xargs rm -f
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|
|
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# Generate tags for editors
|
|
# ---------------------------------------------------------------------------
|
|
quiet_cmd_tags = GEN $@
|
|
cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
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|
|
tags TAGS cscope gtags: FORCE
|
|
$(call cmd,tags)
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|
|
# Scripts to check various things for consistency
|
|
# ---------------------------------------------------------------------------
|
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|
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PHONY += includecheck versioncheck coccicheck namespacecheck export_report
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|
includecheck:
|
|
find $(srctree)/* $(RCS_FIND_IGNORE) \
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-name '*.[hcS]' -type f -print | sort \
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| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
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|
|
versioncheck:
|
|
find $(srctree)/* $(RCS_FIND_IGNORE) \
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|
-name '*.[hcS]' -type f -print | sort \
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| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
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|
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coccicheck:
|
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$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
|
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|
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namespacecheck:
|
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$(PERL) $(srctree)/scripts/namespace.pl
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|
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export_report:
|
|
$(PERL) $(srctree)/scripts/export_report.pl
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|
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endif #ifeq ($(config-targets),1)
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|
endif #ifeq ($(mixed-targets),1)
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|
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PHONY += checkstack kernelrelease kernelversion image_name
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|
|
# 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
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# that $(SUBARCH) doesn't work here.
|
|
ifeq ($(ARCH), um)
|
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CHECKSTACK_ARCH := $(SUBARCH)
|
|
else
|
|
CHECKSTACK_ARCH := $(ARCH)
|
|
endif
|
|
checkstack:
|
|
$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
|
|
$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
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|
|
kernelrelease:
|
|
@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
|
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|
|
kernelversion:
|
|
@echo $(KERNELVERSION)
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|
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image_name:
|
|
@echo $(KBUILD_IMAGE)
|
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|
|
# 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/
|
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|
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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/ $*
|
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|
|
# Single targets
|
|
# ---------------------------------------------------------------------------
|
|
# Single targets are compatible with:
|
|
# - build with mixed source and output
|
|
# - build with separate output dir 'make O=...'
|
|
# - external modules
|
|
#
|
|
# target-dir => where to store outputfile
|
|
# build-dir => directory in kernel source tree to use
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
build-dir = $(patsubst %/,%,$(dir $@))
|
|
target-dir = $(dir $@)
|
|
else
|
|
zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
|
|
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
|
|
|
|
cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(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)
|