You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1844 lines
62 KiB
1844 lines
62 KiB
VERSION = 4 |
|
PATCHLEVEL = 9 |
|
SUBLEVEL = 190 |
|
EXTRAVERSION = |
|
NAME = Roaring Lionus |
|
|
|
# *DOCUMENTATION* |
|
# To see a list of typical targets execute "make help" |
|
# More info can be located in ./README |
|
# Comments in this file are targeted only to the developer, do not |
|
# expect to learn how to build the kernel reading this file. |
|
|
|
# o Do not use make's built-in rules and variables |
|
# (this increases performance and avoids hard-to-debug behaviour); |
|
# o Look for make include files relative to root of kernel src |
|
MAKEFLAGS += -rR --include-dir=$(CURDIR) |
|
|
|
# Avoid funny character set dependencies |
|
unexport LC_ALL |
|
LC_COLLATE=C |
|
LC_NUMERIC=C |
|
export LC_COLLATE LC_NUMERIC |
|
|
|
# Avoid interference with shell env settings |
|
unexport GREP_OPTIONS |
|
|
|
# We are using a recursive build, so we need to do a little thinking |
|
# to get the ordering right. |
|
# |
|
# Most importantly: sub-Makefiles should only ever modify files in |
|
# their own directory. If in some directory we have a dependency on |
|
# a file in another dir (which doesn't happen often, but it's often |
|
# unavoidable when linking the built-in.o targets which finally |
|
# turn into vmlinux), we will call a sub make in that other dir, and |
|
# after that we are sure that everything which is in that other dir |
|
# is now up to date. |
|
# |
|
# The only cases where we need to modify files which have global |
|
# effects are thus separated out and done before the recursive |
|
# descending is started. They are now explicitly listed as the |
|
# prepare rule. |
|
|
|
# Beautify output |
|
# --------------------------------------------------------------------------- |
|
# |
|
# Normally, we echo the whole command before executing it. By making |
|
# that echo $($(quiet)$(cmd)), we now have the possibility to set |
|
# $(quiet) to choose other forms of output instead, e.g. |
|
# |
|
# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ |
|
# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
|
# |
|
# If $(quiet) is empty, the whole command will be printed. |
|
# If it is set to "quiet_", only the short version will be printed. |
|
# If it is set to "silent_", nothing will be printed at all, since |
|
# the variable $(silent_cmd_cc_o_c) doesn't exist. |
|
# |
|
# A simple variant is to prefix commands with $(Q) - that's useful |
|
# for commands that shall be hidden in non-verbose mode. |
|
# |
|
# $(Q)ln $@ :< |
|
# |
|
# If KBUILD_VERBOSE equals 0 then the above command will be hidden. |
|
# If KBUILD_VERBOSE equals 1 then the above command is displayed. |
|
# |
|
# To put more focus on warnings, be less verbose as default |
|
# Use 'make V=1' to see the full commands |
|
|
|
ifeq ("$(origin V)", "command line") |
|
KBUILD_VERBOSE = $(V) |
|
endif |
|
ifndef KBUILD_VERBOSE |
|
KBUILD_VERBOSE = 0 |
|
endif |
|
|
|
ifeq ($(KBUILD_VERBOSE),1) |
|
quiet = |
|
Q = |
|
else |
|
quiet=quiet_ |
|
Q = @ |
|
endif |
|
|
|
# If the user is running make -s (silent mode), suppress echoing of |
|
# commands |
|
|
|
ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4 |
|
ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),) |
|
quiet=silent_ |
|
tools_silent=s |
|
endif |
|
else # make-3.8x |
|
ifneq ($(filter s% -s%,$(MAKEFLAGS)),) |
|
quiet=silent_ |
|
tools_silent=-s |
|
endif |
|
endif |
|
|
|
export quiet Q KBUILD_VERBOSE |
|
|
|
# kbuild supports saving output files in a separate directory. |
|
# To locate output files in a separate directory two syntaxes are supported. |
|
# In both cases the working directory must be the root of the kernel src. |
|
# 1) O= |
|
# Use "make O=dir/to/store/output/files/" |
|
# |
|
# 2) Set KBUILD_OUTPUT |
|
# Set the environment variable KBUILD_OUTPUT to point to the directory |
|
# where the output files shall be placed. |
|
# export KBUILD_OUTPUT=dir/to/store/output/files/ |
|
# make |
|
# |
|
# The O= assignment takes precedence over the KBUILD_OUTPUT environment |
|
# variable. |
|
|
|
# KBUILD_SRC is set on invocation of make in OBJ directory |
|
# KBUILD_SRC is not intended to be used by the regular user (for now) |
|
ifeq ($(KBUILD_SRC),) |
|
|
|
# OK, Make called in directory where kernel src resides |
|
# Do we want to locate output files in a separate directory? |
|
ifeq ("$(origin O)", "command line") |
|
KBUILD_OUTPUT := $(O) |
|
endif |
|
|
|
# That's our default target when none is given on the command line |
|
PHONY := _all |
|
_all: |
|
|
|
# Cancel implicit rules on top Makefile |
|
$(CURDIR)/Makefile Makefile: ; |
|
|
|
ifneq ($(words $(subst :, ,$(CURDIR))), 1) |
|
$(error main directory cannot contain spaces nor colons) |
|
endif |
|
|
|
ifneq ($(KBUILD_OUTPUT),) |
|
# Invoke a second make in the output directory, passing relevant variables |
|
# check that the output directory actually exists |
|
saved-output := $(KBUILD_OUTPUT) |
|
KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ |
|
&& /bin/pwd) |
|
$(if $(KBUILD_OUTPUT),, \ |
|
$(error failed to create output directory "$(saved-output)")) |
|
|
|
PHONY += $(MAKECMDGOALS) sub-make |
|
|
|
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make |
|
@: |
|
|
|
sub-make: |
|
$(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ |
|
-f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) |
|
|
|
# Leave processing to above invocation of make |
|
skip-makefile := 1 |
|
endif # ifneq ($(KBUILD_OUTPUT),) |
|
endif # ifeq ($(KBUILD_SRC),) |
|
|
|
# We process the rest of the Makefile if this is the final invocation of make |
|
ifeq ($(skip-makefile),) |
|
|
|
# Do not print "Entering directory ...", |
|
# but we want to display it when entering to the output directory |
|
# so that IDEs/editors are able to understand relative filenames. |
|
MAKEFLAGS += --no-print-directory |
|
|
|
# Call a source code checker (by default, "sparse") as part of the |
|
# C compilation. |
|
# |
|
# Use 'make C=1' to enable checking of only re-compiled files. |
|
# Use 'make C=2' to enable checking of *all* source files, regardless |
|
# of whether they are re-compiled or not. |
|
# |
|
# See the file "Documentation/sparse.txt" for more details, including |
|
# where to get the "sparse" utility. |
|
|
|
ifeq ("$(origin C)", "command line") |
|
KBUILD_CHECKSRC = $(C) |
|
endif |
|
ifndef KBUILD_CHECKSRC |
|
KBUILD_CHECKSRC = 0 |
|
endif |
|
|
|
# Use make M=dir to specify directory of external module to build |
|
# Old syntax make ... SUBDIRS=$PWD is still supported |
|
# Setting the environment variable KBUILD_EXTMOD take precedence |
|
ifdef SUBDIRS |
|
KBUILD_EXTMOD ?= $(SUBDIRS) |
|
endif |
|
|
|
ifeq ("$(origin M)", "command line") |
|
KBUILD_EXTMOD := $(M) |
|
endif |
|
|
|
# If building an external module we do not care about the all: rule |
|
# but instead _all depend on modules |
|
PHONY += all |
|
ifeq ($(KBUILD_EXTMOD),) |
|
_all: all |
|
else |
|
_all: modules |
|
endif |
|
|
|
ifeq ($(KBUILD_SRC),) |
|
# building in the source tree |
|
srctree := . |
|
else |
|
ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) |
|
# building in a subdirectory of the source tree |
|
srctree := .. |
|
else |
|
srctree := $(KBUILD_SRC) |
|
endif |
|
endif |
|
objtree := . |
|
src := $(srctree) |
|
obj := $(objtree) |
|
|
|
VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) |
|
|
|
export srctree objtree VPATH |
|
|
|
# SUBARCH tells the usermode build what the underlying arch is. That is set |
|
# first, and if a usermode build is happening, the "ARCH=um" on the command |
|
# line overrides the setting of ARCH below. If a native build is happening, |
|
# then ARCH is assigned, getting whatever value it gets normally, and |
|
# SUBARCH is subsequently ignored. |
|
|
|
SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ |
|
-e s/sun4u/sparc64/ \ |
|
-e s/arm.*/arm/ -e s/sa110/arm/ \ |
|
-e s/s390x/s390/ -e s/parisc64/parisc/ \ |
|
-e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ |
|
-e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ ) |
|
|
|
# Cross compiling and selecting different set of gcc/bin-utils |
|
# --------------------------------------------------------------------------- |
|
# |
|
# When performing cross compilation for other architectures ARCH shall be set |
|
# to the target architecture. (See arch/* for the possibilities). |
|
# ARCH can be set during invocation of make: |
|
# make ARCH=ia64 |
|
# Another way is to have ARCH set in the environment. |
|
# The default ARCH is the host where make is executed. |
|
|
|
# CROSS_COMPILE specify the prefix used for all executables used |
|
# during compilation. Only gcc and related bin-utils executables |
|
# are prefixed with $(CROSS_COMPILE). |
|
# CROSS_COMPILE can be set on the command line |
|
# make CROSS_COMPILE=ia64-linux- |
|
# Alternatively CROSS_COMPILE can be set in the environment. |
|
# A third alternative is to store a setting in .config so that plain |
|
# "make" in the configured kernel build directory always uses that. |
|
# Default value for CROSS_COMPILE is not to prefix executables |
|
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile |
|
ARCH ?= $(SUBARCH) |
|
CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) |
|
|
|
# Architecture as present in compile.h |
|
UTS_MACHINE := $(ARCH) |
|
SRCARCH := $(ARCH) |
|
|
|
# Additional ARCH settings for x86 |
|
ifeq ($(ARCH),i386) |
|
SRCARCH := x86 |
|
endif |
|
ifeq ($(ARCH),x86_64) |
|
SRCARCH := x86 |
|
endif |
|
|
|
# Additional ARCH settings for sparc |
|
ifeq ($(ARCH),sparc32) |
|
SRCARCH := sparc |
|
endif |
|
ifeq ($(ARCH),sparc64) |
|
SRCARCH := sparc |
|
endif |
|
|
|
# Additional ARCH settings for sh |
|
ifeq ($(ARCH),sh64) |
|
SRCARCH := sh |
|
endif |
|
|
|
# Additional ARCH settings for tile |
|
ifeq ($(ARCH),tilepro) |
|
SRCARCH := tile |
|
endif |
|
ifeq ($(ARCH),tilegx) |
|
SRCARCH := tile |
|
endif |
|
|
|
# Where to locate arch specific headers |
|
hdr-arch := $(SRCARCH) |
|
|
|
KCONFIG_CONFIG ?= .config |
|
export KCONFIG_CONFIG |
|
|
|
# SHELL used by kbuild |
|
CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ |
|
else if [ -x /bin/bash ]; then echo /bin/bash; \ |
|
else echo sh; fi ; fi) |
|
|
|
HOSTCC = gcc |
|
HOSTCXX = g++ |
|
HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89 |
|
HOSTCXXFLAGS = -O2 |
|
|
|
# Decide whether to build built-in, modular, or both. |
|
# Normally, just do built-in. |
|
|
|
KBUILD_MODULES := |
|
KBUILD_BUILTIN := 1 |
|
|
|
# If we have only "make modules", don't compile built-in objects. |
|
# When we're building modules with modversions, we need to consider |
|
# the built-in objects during the descend as well, in order to |
|
# make sure the checksums are up to date before we record them. |
|
|
|
ifeq ($(MAKECMDGOALS),modules) |
|
KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) |
|
endif |
|
|
|
# If we have "make <whatever> modules", compile modules |
|
# in addition to whatever we do anyway. |
|
# Just "make" or "make all" shall build modules as well |
|
|
|
ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) |
|
KBUILD_MODULES := 1 |
|
endif |
|
|
|
ifeq ($(MAKECMDGOALS),) |
|
KBUILD_MODULES := 1 |
|
endif |
|
|
|
export KBUILD_MODULES KBUILD_BUILTIN |
|
export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD |
|
|
|
# We need some generic definitions (do not try to remake the file). |
|
scripts/Kbuild.include: ; |
|
include scripts/Kbuild.include |
|
|
|
# Make variables (CC, etc...) |
|
AS = $(CROSS_COMPILE)as |
|
LD = $(CROSS_COMPILE)ld |
|
LDGOLD = $(CROSS_COMPILE)ld.gold |
|
CC = $(CROSS_COMPILE)gcc |
|
CPP = $(CC) -E |
|
AR = $(CROSS_COMPILE)ar |
|
NM = $(CROSS_COMPILE)nm |
|
STRIP = $(CROSS_COMPILE)strip |
|
OBJCOPY = $(CROSS_COMPILE)objcopy |
|
OBJDUMP = $(CROSS_COMPILE)objdump |
|
AWK = awk |
|
GENKSYMS = scripts/genksyms/genksyms |
|
INSTALLKERNEL := installkernel |
|
DEPMOD = /sbin/depmod |
|
PERL = perl |
|
PYTHON = python |
|
CHECK = sparse |
|
|
|
CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
|
-Wbitwise -Wno-return-void $(CF) |
|
NOSTDINC_FLAGS = |
|
CFLAGS_MODULE = |
|
AFLAGS_MODULE = |
|
LDFLAGS_MODULE = |
|
CFLAGS_KERNEL = |
|
AFLAGS_KERNEL = |
|
LDFLAGS_vmlinux = |
|
|
|
# Use USERINCLUDE when you must reference the UAPI directories only. |
|
USERINCLUDE := \ |
|
-I$(srctree)/arch/$(hdr-arch)/include/uapi \ |
|
-I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \ |
|
-I$(srctree)/include/uapi \ |
|
-I$(objtree)/include/generated/uapi \ |
|
-include $(srctree)/include/linux/kconfig.h |
|
|
|
# Use LINUXINCLUDE when you must reference the include/ directory. |
|
# Needed to be compatible with the O= option |
|
LINUXINCLUDE := \ |
|
-I$(srctree)/arch/$(hdr-arch)/include \ |
|
-I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \ |
|
-I$(objtree)/arch/$(hdr-arch)/include/generated \ |
|
$(if $(KBUILD_SRC), -I$(srctree)/include) \ |
|
-I$(objtree)/include |
|
|
|
LINUXINCLUDE += $(filter-out $(LINUXINCLUDE),$(USERINCLUDE)) |
|
|
|
KBUILD_AFLAGS := -D__ASSEMBLY__ |
|
KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ |
|
-fno-strict-aliasing -fno-common -fshort-wchar \ |
|
-Werror-implicit-function-declaration \ |
|
-Wno-format-security \ |
|
-std=gnu89 |
|
KBUILD_CPPFLAGS := -D__KERNEL__ |
|
KBUILD_AFLAGS_KERNEL := |
|
KBUILD_CFLAGS_KERNEL := |
|
KBUILD_AFLAGS_MODULE := -DMODULE |
|
KBUILD_CFLAGS_MODULE := -DMODULE |
|
KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds |
|
GCC_PLUGINS_CFLAGS := |
|
CLANG_FLAGS := |
|
|
|
# Read KERNELRELEASE from include/config/kernel.release (if it exists) |
|
KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) |
|
KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) |
|
|
|
export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION |
|
export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC |
|
export CPP AR NM STRIP OBJCOPY OBJDUMP |
|
export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE |
|
export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
|
|
|
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS |
|
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
|
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/ |
|
PHONY += scripts_basic |
|
scripts_basic: |
|
$(Q)$(MAKE) $(build)=scripts/basic |
|
$(Q)rm -f .tmp_quiet_recordmcount |
|
|
|
# To avoid any implicit rule to kick in, define an empty command. |
|
scripts/basic/%: scripts_basic ; |
|
|
|
PHONY += outputmakefile |
|
# outputmakefile generates a Makefile in the output directory, if using a |
|
# separate output directory. This allows convenient use of make in the |
|
# output directory. |
|
outputmakefile: |
|
ifneq ($(KBUILD_SRC),) |
|
$(Q)ln -fsn $(srctree) source |
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ |
|
$(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) |
|
endif |
|
|
|
# Support for using generic headers in asm-generic |
|
PHONY += asm-generic |
|
asm-generic: |
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ |
|
src=asm obj=arch/$(SRCARCH)/include/generated/asm |
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ |
|
src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm |
|
|
|
# To make sure we do not include .config for any of the *config targets |
|
# catch them early, and hand them over to scripts/kconfig/Makefile |
|
# It is allowed to specify more targets when calling make, including |
|
# mixing *config targets and build targets. |
|
# For example 'make oldconfig all'. |
|
# Detect when mixed targets is specified, and make a second invocation |
|
# of make so .config is not included in this case either (for *config). |
|
|
|
version_h := include/generated/uapi/linux/version.h |
|
old_version_h := include/linux/version.h |
|
|
|
no-dot-config-targets := clean mrproper distclean \ |
|
cscope gtags TAGS tags help% %docs check% coccicheck \ |
|
$(version_h) headers_% archheaders archscripts \ |
|
kernelversion %src-pkg |
|
|
|
config-targets := 0 |
|
mixed-targets := 0 |
|
dot-config := 1 |
|
|
|
ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) |
|
ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) |
|
dot-config := 0 |
|
endif |
|
endif |
|
|
|
ifeq ($(KBUILD_EXTMOD),) |
|
ifneq ($(filter config %config,$(MAKECMDGOALS)),) |
|
config-targets := 1 |
|
ifneq ($(words $(MAKECMDGOALS)),1) |
|
mixed-targets := 1 |
|
endif |
|
endif |
|
endif |
|
# install and module_install need also be processed one by one |
|
ifneq ($(filter install,$(MAKECMDGOALS)),) |
|
ifneq ($(filter modules_install,$(MAKECMDGOALS)),) |
|
mixed-targets := 1 |
|
endif |
|
endif |
|
|
|
ifeq ($(cc-name),clang) |
|
ifneq ($(CROSS_COMPILE),) |
|
CLANG_TRIPLE ?= $(CROSS_COMPILE) |
|
CLANG_FLAGS += --target=$(notdir $(CLANG_TRIPLE:%-=%)) |
|
ifeq ($(shell $(srctree)/scripts/clang-android.sh $(CC) $(CLANG_FLAGS)), y) |
|
$(error "Clang with Android --target detected. Did you specify CLANG_TRIPLE?") |
|
endif |
|
GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) |
|
CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) |
|
GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) |
|
endif |
|
ifneq ($(GCC_TOOLCHAIN),) |
|
CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) |
|
endif |
|
CLANG_FLAGS += -no-integrated-as |
|
CLANG_FLAGS += -Werror=unknown-warning-option |
|
KBUILD_CFLAGS += $(CLANG_FLAGS) |
|
KBUILD_AFLAGS += $(CLANG_FLAGS) |
|
endif |
|
|
|
|
|
ifeq ($(mixed-targets),1) |
|
# =========================================================================== |
|
# We're called with mixed targets (*config and build targets). |
|
# Handle them one by one. |
|
|
|
PHONY += $(MAKECMDGOALS) __build_one_by_one |
|
|
|
$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one |
|
@: |
|
|
|
__build_one_by_one: |
|
$(Q)set -e; \ |
|
for i in $(MAKECMDGOALS); do \ |
|
$(MAKE) -f $(srctree)/Makefile $$i; \ |
|
done |
|
|
|
else |
|
ifeq ($(config-targets),1) |
|
# =========================================================================== |
|
# *config targets only - make sure prerequisites are updated, and descend |
|
# in scripts/kconfig to make the *config target |
|
|
|
# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. |
|
# KBUILD_DEFCONFIG may point out an alternative default configuration |
|
# used for 'make defconfig' |
|
include arch/$(SRCARCH)/Makefile |
|
export KBUILD_DEFCONFIG KBUILD_KCONFIG |
|
|
|
config: scripts_basic outputmakefile FORCE |
|
$(Q)$(MAKE) $(build)=scripts/kconfig $@ |
|
|
|
%config: scripts_basic outputmakefile FORCE |
|
$(Q)$(MAKE) $(build)=scripts/kconfig $@ |
|
|
|
else |
|
# =========================================================================== |
|
# Build targets only - this includes vmlinux, arch specific targets, clean |
|
# targets and others. In general all targets except *config targets. |
|
|
|
ifeq ($(KBUILD_EXTMOD),) |
|
# Additional helpers built in scripts/ |
|
# Carefully list dependencies so we do not try to build scripts twice |
|
# in parallel |
|
PHONY += scripts |
|
scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \ |
|
asm-generic gcc-plugins |
|
$(Q)$(MAKE) $(build)=$(@) |
|
|
|
# Objects we will link into vmlinux / subdirs we need to visit |
|
init-y := init/ |
|
drivers-y := drivers/ sound/ firmware/ |
|
net-y := net/ |
|
libs-y := lib/ |
|
core-y := usr/ |
|
virt-y := virt/ |
|
endif # KBUILD_EXTMOD |
|
|
|
ifeq ($(dot-config),1) |
|
# Read in config |
|
-include include/config/auto.conf |
|
|
|
ifeq ($(KBUILD_EXTMOD),) |
|
# Read in dependencies to all Kconfig* files, make sure to run |
|
# oldconfig if changes are detected. |
|
-include include/config/auto.conf.cmd |
|
|
|
# To avoid any implicit rule to kick in, define an empty command |
|
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; |
|
|
|
# If .config is newer than include/config/auto.conf, someone tinkered |
|
# with it and forgot to run make oldconfig. |
|
# if auto.conf.cmd is missing then we are probably in a cleaned tree so |
|
# we execute the config step to be sure to catch updated Kconfig files |
|
include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd |
|
$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig |
|
else |
|
# external modules needs include/generated/autoconf.h and include/config/auto.conf |
|
# but do not care if they are up-to-date. Use auto.conf to trigger the test |
|
PHONY += include/config/auto.conf |
|
|
|
include/config/auto.conf: |
|
$(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
|
echo >&2; \ |
|
echo >&2 " ERROR: Kernel configuration is invalid."; \ |
|
echo >&2 " include/generated/autoconf.h or $@ are missing.";\ |
|
echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ |
|
echo >&2 ; \ |
|
/bin/false) |
|
|
|
endif # KBUILD_EXTMOD |
|
|
|
else |
|
# Dummy target needed, because used as prerequisite |
|
include/config/auto.conf: ; |
|
endif # $(dot-config) |
|
|
|
# For the kernel to actually contain only the needed exported symbols, |
|
# we have to build modules as well to determine what those symbols are. |
|
# (this can be evaluated only once include/config/auto.conf has been included) |
|
ifdef CONFIG_TRIM_UNUSED_KSYMS |
|
KBUILD_MODULES := 1 |
|
endif |
|
|
|
# The all: target is the default when no target is given on the |
|
# command line. |
|
# This allow a user to issue only 'make' to build a kernel including modules |
|
# Defaults to vmlinux, but the arch makefile usually adds further targets |
|
all: vmlinux |
|
|
|
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,) |
|
CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,) |
|
export CFLAGS_GCOV CFLAGS_KCOV |
|
|
|
# Make toolchain changes before including arch/$(SRCARCH)/Makefile to ensure |
|
# ar/cc/ld-* macros return correct values. |
|
ifdef CONFIG_LTO_CLANG |
|
# use GNU gold with LLVMgold for LTO linking, and LD for vmlinux_link |
|
LDFINAL_vmlinux := $(LD) |
|
LD := $(LDGOLD) |
|
LDFLAGS += -plugin LLVMgold.so |
|
# use llvm-ar for building symbol tables from IR files, and llvm-dis instead |
|
# of objdump for processing symbol versions and exports |
|
LLVM_AR := llvm-ar |
|
LLVM_DIS := llvm-dis |
|
export LLVM_AR LLVM_DIS |
|
endif |
|
|
|
# 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) |
|
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
|
KBUILD_CFLAGS += $(call cc-disable-warning, attribute-alias) |
|
|
|
ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
|
KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,) |
|
KBUILD_CFLAGS += $(call cc-option,-fdata-sections,) |
|
endif |
|
|
|
ifdef CONFIG_LTO_CLANG |
|
lto-clang-flags := -flto -fvisibility=hidden |
|
|
|
# allow disabling only clang LTO where needed |
|
DISABLE_LTO_CLANG := -fno-lto -fvisibility=default |
|
export DISABLE_LTO_CLANG |
|
endif |
|
|
|
ifdef CONFIG_LTO |
|
lto-flags := $(lto-clang-flags) |
|
KBUILD_CFLAGS += $(lto-flags) |
|
|
|
DISABLE_LTO := $(DISABLE_LTO_CLANG) |
|
export DISABLE_LTO |
|
|
|
# LDFINAL_vmlinux and LDFLAGS_FINAL_vmlinux can be set to override |
|
# the linker and flags for vmlinux_link. |
|
export LDFINAL_vmlinux LDFLAGS_FINAL_vmlinux |
|
endif |
|
|
|
ifdef CONFIG_CFI_CLANG |
|
cfi-clang-flags += -fsanitize=cfi |
|
DISABLE_CFI_CLANG := -fno-sanitize=cfi |
|
ifdef CONFIG_MODULES |
|
cfi-clang-flags += -fsanitize-cfi-cross-dso |
|
DISABLE_CFI_CLANG += -fno-sanitize-cfi-cross-dso |
|
endif |
|
ifdef CONFIG_CFI_PERMISSIVE |
|
cfi-clang-flags += -fsanitize-recover=cfi -fno-sanitize-trap=cfi |
|
endif |
|
|
|
# also disable CFI when LTO is disabled |
|
DISABLE_LTO_CLANG += $(DISABLE_CFI_CLANG) |
|
# allow disabling only clang CFI where needed |
|
export DISABLE_CFI_CLANG |
|
endif |
|
|
|
ifdef CONFIG_CFI |
|
# cfi-flags are re-tested in prepare-compiler-check |
|
cfi-flags := $(cfi-clang-flags) |
|
KBUILD_CFLAGS += $(cfi-flags) |
|
|
|
DISABLE_CFI := $(DISABLE_CFI_CLANG) |
|
DISABLE_LTO += $(DISABLE_CFI) |
|
export DISABLE_CFI |
|
endif |
|
|
|
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
|
KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) |
|
else |
|
ifdef CONFIG_PROFILE_ALL_BRANCHES |
|
KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) |
|
else |
|
KBUILD_CFLAGS += -O2 |
|
endif |
|
endif |
|
|
|
KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ |
|
$(call cc-disable-warning,maybe-uninitialized,)) |
|
|
|
# Tell gcc to never replace conditional load with a non-conditional one |
|
KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) |
|
|
|
# check for 'asm goto' |
|
ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y) |
|
KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO |
|
KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO |
|
endif |
|
|
|
include scripts/Makefile.gcc-plugins |
|
|
|
ifdef CONFIG_READABLE_ASM |
|
# Disable optimizations that make assembler listings hard to read. |
|
# reorder blocks reorders the control in the function |
|
# ipa clone creates specialized cloned functions |
|
# partial inlining inlines only parts of functions |
|
KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ |
|
$(call cc-option,-fno-ipa-cp-clone,) \ |
|
$(call cc-option,-fno-partial-inlining) |
|
endif |
|
|
|
ifneq ($(CONFIG_FRAME_WARN),0) |
|
KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) |
|
endif |
|
|
|
# This selects the stack protector compiler flag. Testing it is delayed |
|
# until after .config has been reprocessed, in the prepare-compiler-check |
|
# target. |
|
ifdef CONFIG_CC_STACKPROTECTOR_REGULAR |
|
stackp-flag := -fstack-protector |
|
stackp-name := REGULAR |
|
else |
|
ifdef CONFIG_CC_STACKPROTECTOR_STRONG |
|
stackp-flag := -fstack-protector-strong |
|
stackp-name := STRONG |
|
else |
|
# Force off for distro compilers that enable stack protector by default. |
|
stackp-flag := $(call cc-option, -fno-stack-protector) |
|
endif |
|
endif |
|
# Find arch-specific stack protector compiler sanity-checking script. |
|
ifdef CONFIG_CC_STACKPROTECTOR |
|
stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh |
|
stackp-check := $(wildcard $(stackp-path)) |
|
endif |
|
KBUILD_CFLAGS += $(stackp-flag) |
|
|
|
ifeq ($(cc-name),clang) |
|
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, duplicate-decl-specifier) |
|
# 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) |
|
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 |
|
|
|
# arch Makefile may override CC so keep this after arch Makefile is included |
|
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
|
CHECKFLAGS += $(NOSTDINC_FLAGS) |
|
|
|
# warn about C99 declaration after statement |
|
KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) |
|
|
|
# disable pointer signed / unsigned warnings in gcc 4.0 |
|
KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) |
|
|
|
# disable stringop warnings in gcc 8+ |
|
KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) |
|
|
|
# disable invalid "can't wrap" optimizations for signed / pointers |
|
KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
|
|
|
# clang sets -fmerge-all-constants by default as optimization, but this |
|
# is non-conforming behavior for C and in fact breaks the kernel, so we |
|
# need to disable it here generally. |
|
KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) |
|
|
|
# for gcc -fno-merge-all-constants disables everything, but it is fine |
|
# to have actual conforming behavior enabled. |
|
KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) |
|
|
|
# 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) |
|
|
|
# use the deterministic mode of AR if available |
|
KBUILD_ARFLAGS := $(call ar-option,D) |
|
|
|
include scripts/Makefile.kasan |
|
include scripts/Makefile.extrawarn |
|
include scripts/Makefile.ubsan |
|
|
|
# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the |
|
# last assignments |
|
KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) |
|
KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) |
|
KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) |
|
|
|
# Use --build-id when available. |
|
LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ |
|
$(call cc-ldoption, -Wl$(comma)--build-id,)) |
|
KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) |
|
LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) |
|
|
|
ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
|
LDFLAGS_vmlinux += $(call ld-option, --gc-sections,) |
|
endif |
|
|
|
ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
|
LDFLAGS_vmlinux += $(call ld-option, -X,) |
|
endif |
|
|
|
# Default kernel image to build when no specific target is given. |
|
# KBUILD_IMAGE may be overruled on the command line or |
|
# set in the environment |
|
# Also any assignments in arch/$(ARCH)/Makefile take precedence over |
|
# this default value |
|
export KBUILD_IMAGE ?= vmlinux |
|
|
|
# |
|
# INSTALL_PATH specifies where to place the updated kernel and system map |
|
# images. Default is /boot, but you can set it to other values |
|
export INSTALL_PATH ?= /boot |
|
|
|
# |
|
# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. |
|
# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as |
|
# an argument if needed. Otherwise it defaults to the kernel install path |
|
# |
|
export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) |
|
|
|
# |
|
# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory |
|
# relocations required by build roots. This is not defined in the |
|
# makefile but the argument can be passed to make if needed. |
|
# |
|
|
|
MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
|
export MODLIB |
|
|
|
# |
|
# INSTALL_MOD_STRIP, if defined, will cause modules to be |
|
# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then |
|
# the default option --strip-debug will be used. Otherwise, |
|
# INSTALL_MOD_STRIP value will be used as the options to the strip command. |
|
|
|
ifdef INSTALL_MOD_STRIP |
|
ifeq ($(INSTALL_MOD_STRIP),1) |
|
mod_strip_cmd = $(STRIP) --strip-debug |
|
else |
|
mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
|
endif # INSTALL_MOD_STRIP=1 |
|
else |
|
mod_strip_cmd = true |
|
endif # INSTALL_MOD_STRIP |
|
export mod_strip_cmd |
|
|
|
# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
|
# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP |
|
# or CONFIG_MODULE_COMPRESS_XZ. |
|
|
|
mod_compress_cmd = true |
|
ifdef CONFIG_MODULE_COMPRESS |
|
ifdef CONFIG_MODULE_COMPRESS_GZIP |
|
mod_compress_cmd = gzip -n -f |
|
endif # CONFIG_MODULE_COMPRESS_GZIP |
|
ifdef CONFIG_MODULE_COMPRESS_XZ |
|
mod_compress_cmd = xz -f |
|
endif # CONFIG_MODULE_COMPRESS_XZ |
|
endif # CONFIG_MODULE_COMPRESS |
|
export mod_compress_cmd |
|
|
|
# Select initial ramdisk compression format, default is gzip(1). |
|
# This shall be used by the dracut(8) tool while creating an initramfs image. |
|
# |
|
INITRD_COMPRESS-y := gzip |
|
INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 |
|
INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma |
|
INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz |
|
INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo |
|
INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 |
|
# do not export INITRD_COMPRESS, since we didn't actually |
|
# choose a sane default compression above. |
|
# export INITRD_COMPRESS := $(INITRD_COMPRESS-y) |
|
|
|
ifdef CONFIG_MODULE_SIG_ALL |
|
$(eval $(call config_filename,MODULE_SIG_KEY)) |
|
|
|
mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 |
|
else |
|
mod_sign_cmd = true |
|
endif |
|
export mod_sign_cmd |
|
|
|
|
|
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 := $(patsubst %/, %/built-in.o, $(libs-y)) |
|
libs-y := $(libs-y1) $(libs-y2) |
|
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-y) $(drivers-y) $(net-y) $(virt-y) |
|
export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
|
export LDFLAGS_vmlinux |
|
# used by scripts/pacmage/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) |
|
|
|
# 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 `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py |
|
endif |
|
ifdef CONFIG_TRIM_UNUSED_KSYMS |
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
|
"$(MAKE) -f $(srctree)/Makefile vmlinux" |
|
endif |
|
|
|
# standalone target for easier testing |
|
include/generated/autoksyms.h: FORCE |
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true |
|
|
|
ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
|
|
|
# Final link of vmlinux with optional arch pass after final link |
|
cmd_link-vmlinux = \ |
|
$(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \ |
|
$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
|
|
|
vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE |
|
+$(call if_changed,link-vmlinux) |
|
|
|
# Build samples along the rest of the kernel |
|
ifdef CONFIG_SAMPLES |
|
vmlinux-dirs += samples |
|
endif |
|
|
|
# The actual objects are generated when descending, |
|
# make sure no implicit rule kicks in |
|
$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; |
|
|
|
# Handle descending into subdirectories listed in $(vmlinux-dirs) |
|
# Preset locale variables to speed up the build process. Limit locale |
|
# tweaks to this spot to avoid wrong language settings when running |
|
# make menuconfig etc. |
|
# Error messages still appears in the original language |
|
|
|
PHONY += $(vmlinux-dirs) |
|
$(vmlinux-dirs): prepare scripts |
|
$(Q)$(MAKE) $(build)=$@ |
|
|
|
define filechk_kernel.release |
|
echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
|
endef |
|
|
|
# Store (new) KERNELRELEASE string in include/config/kernel.release |
|
include/config/kernel.release: include/config/auto.conf FORCE |
|
$(call filechk,kernel.release) |
|
|
|
|
|
# Things we need to do before we recursively start building the kernel |
|
# or the modules are listed in "prepare". |
|
# A multi level approach is used. prepareN is processed before prepareN-1. |
|
# archprepare is used in arch Makefiles and when processed asm symlink, |
|
# version.h and scripts_basic is processed / created. |
|
|
|
# Listed in dependency order |
|
PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 |
|
|
|
# prepare3 is used to check if we are building in a separate output directory, |
|
# and if so do: |
|
# 1) Check that make has not been executed in the kernel src $(srctree) |
|
prepare3: include/config/kernel.release |
|
ifneq ($(KBUILD_SRC),) |
|
@$(kecho) ' Using $(srctree) as source for kernel' |
|
$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
|
echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ |
|
echo >&2 " in the '$(srctree)' directory.";\ |
|
/bin/false; \ |
|
fi; |
|
endif |
|
|
|
# prepare2 creates a makefile if using a separate output directory. |
|
# From this point forward, .config has been reprocessed, so any rules |
|
# that need to depend on updated CONFIG_* values can be checked here. |
|
prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic |
|
|
|
prepare1: prepare2 $(version_h) include/generated/utsrelease.h \ |
|
include/config/auto.conf |
|
$(cmd_crmodverdir) |
|
|
|
archprepare: archheaders archscripts prepare1 scripts_basic |
|
|
|
prepare0: archprepare gcc-plugins |
|
$(Q)$(MAKE) $(build)=. |
|
|
|
# All the preparing.. |
|
prepare: prepare0 prepare-objtool |
|
|
|
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 |
|
$(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel") |
|
SKIP_STACK_VALIDATION := 1 |
|
export SKIP_STACK_VALIDATION |
|
endif |
|
endif |
|
|
|
PHONY += prepare-objtool |
|
prepare-objtool: $(objtool_target) |
|
|
|
# Check for CONFIG flags that require compiler support. Abort the build |
|
# after .config has been processed, but before the kernel build starts. |
|
# |
|
# For security-sensitive CONFIG options, we don't want to fallback and/or |
|
# silently change which compiler flags will be used, since that leads to |
|
# producing kernels with different security feature characteristics |
|
# depending on the compiler used. (For example, "But I selected |
|
# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") |
|
PHONY += prepare-compiler-check |
|
prepare-compiler-check: FORCE |
|
# Make sure we're using a supported toolchain with LTO_CLANG |
|
ifdef CONFIG_LTO_CLANG |
|
ifneq ($(call clang-ifversion, -ge, 0500, y), y) |
|
@echo Cannot use CONFIG_LTO_CLANG: requires clang 5.0 or later >&2 && exit 1 |
|
endif |
|
ifneq ($(call gold-ifversion, -ge, 112000000, y), y) |
|
@echo Cannot use CONFIG_LTO_CLANG: requires GNU gold 1.12 or later >&2 && exit 1 |
|
endif |
|
endif |
|
# Make sure compiler supports LTO flags |
|
ifdef lto-flags |
|
ifeq ($(call cc-option, $(lto-flags)),) |
|
@echo Cannot use CONFIG_LTO: $(lto-flags) not supported by compiler \ |
|
>&2 && exit 1 |
|
endif |
|
endif |
|
# Make sure compiler supports requested stack protector flag. |
|
ifdef stackp-name |
|
ifeq ($(call cc-option, $(stackp-flag)),) |
|
@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ |
|
$(stackp-flag) not supported by compiler >&2 && exit 1 |
|
endif |
|
endif |
|
# Make sure compiler does not have buggy stack-protector support. |
|
ifdef stackp-check |
|
ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) |
|
@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ |
|
$(stackp-flag) available but compiler is broken >&2 && exit 1 |
|
endif |
|
endif |
|
ifdef cfi-flags |
|
ifeq ($(call cc-option, $(cfi-flags)),) |
|
@echo Cannot use CONFIG_CFI: $(cfi-flags) not supported by compiler >&2 && exit 1 |
|
endif |
|
endif |
|
@: |
|
|
|
# Generate some files |
|
# --------------------------------------------------------------------------- |
|
|
|
# KERNELRELEASE can change from a few different places, meaning version.h |
|
# needs to be updated, so this check is forced on all builds |
|
|
|
uts_len := 64 |
|
define filechk_utsrelease.h |
|
if [ `echo -n "$(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 |
|
|
|
# --------------------------------------------------------------------------- |
|
# Firmware install |
|
INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware |
|
export INSTALL_FW_PATH |
|
|
|
PHONY += firmware_install |
|
firmware_install: |
|
@mkdir -p $(objtree)/firmware |
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install |
|
|
|
# --------------------------------------------------------------------------- |
|
# Kernel headers |
|
|
|
#Default location for installed headers |
|
export INSTALL_HDR_PATH = $(objtree)/usr |
|
|
|
# If we do an all arch process set dst to asm-$(hdr-arch) |
|
hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) |
|
|
|
PHONY += archheaders |
|
archheaders: |
|
|
|
PHONY += archscripts |
|
archscripts: |
|
|
|
PHONY += __headers |
|
__headers: $(version_h) scripts_basic asm-generic archheaders archscripts |
|
$(Q)$(MAKE) $(build)=scripts build_unifdef |
|
|
|
PHONY += headers_install_all |
|
headers_install_all: |
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install |
|
|
|
PHONY += headers_install |
|
headers_install: __headers |
|
$(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ |
|
$(error Headers not exportable for the $(SRCARCH) architecture)) |
|
$(Q)$(MAKE) $(hdr-inst)=include/uapi |
|
$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(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 HDRCHECK=1 |
|
$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1 |
|
|
|
# --------------------------------------------------------------------------- |
|
# Kernel selftest |
|
|
|
PHONY += kselftest |
|
kselftest: |
|
$(Q)$(MAKE) -C tools/testing/selftests run_tests |
|
|
|
kselftest-clean: |
|
$(Q)$(MAKE) -C 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[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order |
|
@$(kecho) ' Building modules, stage 2.'; |
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild |
|
|
|
modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) |
|
$(Q)$(AWK) '!x[$$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 `cd $(srctree) && /bin/pwd` $(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_ |
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst |
|
$(call cmd,depmod) |
|
|
|
ifeq ($(CONFIG_MODULE_SIG), y) |
|
PHONY += modules_sign |
|
modules_sign: |
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign |
|
endif |
|
|
|
else # CONFIG_MODULES |
|
|
|
# Modules not configured |
|
# --------------------------------------------------------------------------- |
|
|
|
PHONY += modules modules_install |
|
modules modules_install: |
|
@echo >&2 |
|
@echo >&2 "The present kernel configuration has modules disabled." |
|
@echo >&2 "Type 'make config' and enable loadable module support." |
|
@echo >&2 "Then build a kernel with module support enabled." |
|
@echo >&2 |
|
@exit 1 |
|
|
|
endif # CONFIG_MODULES |
|
|
|
### |
|
# Cleaning is done on three levels. |
|
# make clean Delete most generated files |
|
# Leave enough to build external modules |
|
# make mrproper Delete the current configuration, and all generated files |
|
# make distclean Remove editor backup files, patch leftover files and the like |
|
|
|
# Directories & files removed with 'make clean' |
|
CLEAN_DIRS += $(MODVERDIR) |
|
|
|
# Directories & files removed with 'make mrproper' |
|
MRPROPER_DIRS += include/config usr/include include/generated \ |
|
arch/*/include/generated .tmp_objdiff |
|
MRPROPER_FILES += .config .config.old .version .old_version \ |
|
Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ |
|
signing_key.pem signing_key.priv signing_key.x509 \ |
|
x509.genkey extra_certificates signing_key.x509.keyid \ |
|
signing_key.x509.signer vmlinux-gdb.py |
|
|
|
# clean - Delete most, but leave enough to build external modules |
|
# |
|
clean: rm-dirs := $(CLEAN_DIRS) |
|
clean: rm-files := $(CLEAN_FILES) |
|
clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) |
|
|
|
PHONY += $(clean-dirs) clean archclean vmlinuxclean |
|
$(clean-dirs): |
|
$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
|
|
|
vmlinuxclean: |
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean |
|
$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
|
|
|
clean: archclean vmlinuxclean |
|
|
|
# mrproper - Delete all generated files, including .config |
|
# |
|
mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) |
|
mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
|
mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) |
|
|
|
PHONY += $(mrproper-dirs) mrproper archmrproper |
|
$(mrproper-dirs): |
|
$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) |
|
|
|
mrproper: clean archmrproper $(mrproper-dirs) |
|
$(call cmd,rmdirs) |
|
$(call cmd,rmfiles) |
|
|
|
# distclean |
|
# |
|
PHONY += distclean |
|
|
|
distclean: mrproper |
|
@find $(srctree) $(RCS_FIND_IGNORE) \ |
|
\( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
|
-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ |
|
-o -name '.*.rej' -o -name '*%' -o -name 'core' \) \ |
|
-type f -print | xargs rm -f |
|
|
|
|
|
# Packaging of the kernel to various formats |
|
# --------------------------------------------------------------------------- |
|
# rpm target kept for backward compatibility |
|
package-dir := scripts/package |
|
|
|
%src-pkg: FORCE |
|
$(Q)$(MAKE) $(build)=$(package-dir) $@ |
|
%pkg: include/config/kernel.release FORCE |
|
$(Q)$(MAKE) $(build)=$(package-dir) $@ |
|
rpm: include/config/kernel.release FORCE |
|
$(Q)$(MAKE) $(build)=$(package-dir) $@ |
|
|
|
|
|
# Brief documentation of the typical targets used |
|
# --------------------------------------------------------------------------- |
|
|
|
boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
|
boards := $(sort $(notdir $(boards))) |
|
board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
|
board-dirs := $(sort $(notdir $(board-dirs:/=))) |
|
|
|
PHONY += help |
|
help: |
|
@echo 'Cleaning targets:' |
|
@echo ' clean - Remove most generated files but keep the config and' |
|
@echo ' enough build support to build external modules' |
|
@echo ' mrproper - Remove all generated files + config + various backup files' |
|
@echo ' distclean - mrproper + remove editor backup and patch files' |
|
@echo '' |
|
@echo 'Configuration targets:' |
|
@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help |
|
@echo '' |
|
@echo 'Other generic targets:' |
|
@echo ' all - Build all targets marked with [*]' |
|
@echo '* vmlinux - Build the bare kernel' |
|
@echo '* modules - Build all modules' |
|
@echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
|
@echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' |
|
@echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' |
|
@echo ' dir/ - Build all files in dir and below' |
|
@echo ' dir/file.[ois] - Build specified target only' |
|
@echo ' dir/file.ll - Build the LLVM assembly file' |
|
@echo ' (requires compiler support for LLVM assembly generation)' |
|
@echo ' dir/file.lst - Build specified mixed source/assembly target only' |
|
@echo ' (requires a recent binutils and recent build (System.map))' |
|
@echo ' dir/file.ko - Build module including final link' |
|
@echo ' modules_prepare - Set up for building external modules' |
|
@echo ' tags/TAGS - Generate tags file for editors' |
|
@echo ' cscope - Generate cscope index' |
|
@echo ' gtags - Generate GNU GLOBAL index' |
|
@echo ' kernelrelease - Output the release version string (use with make -s)' |
|
@echo ' kernelversion - Output the version stored in Makefile (use with make -s)' |
|
@echo ' image_name - Output the image name (use with make -s)' |
|
@echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
|
echo ' (default: $(INSTALL_HDR_PATH))'; \ |
|
echo '' |
|
@echo 'Static analysers' |
|
@echo ' checkstack - Generate a list of stack hogs' |
|
@echo ' namespacecheck - Name space analysis on compiled kernel' |
|
@echo ' versioncheck - Sanity check on version.h usage' |
|
@echo ' includecheck - Check for duplicate included header files' |
|
@echo ' export_report - List the usages of all exported symbols' |
|
@echo ' headers_check - Sanity check on exported headers' |
|
@echo ' headerdep - Detect inclusion cycles in headers' |
|
@$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help |
|
@echo '' |
|
@echo 'Kernel selftest' |
|
@echo ' kselftest - Build and run kernel selftest (run as root)' |
|
@echo ' Build, install, and boot kernel before' |
|
@echo ' running kselftest on it' |
|
@echo ' kselftest-clean - Remove all generated kselftest files' |
|
@echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed' |
|
@echo ' .config.' |
|
@echo '' |
|
@echo 'Kernel packaging:' |
|
@$(MAKE) $(build)=$(package-dir) help |
|
@echo '' |
|
@echo 'Documentation targets:' |
|
@$(MAKE) -f $(srctree)/Documentation/Makefile.sphinx dochelp |
|
@echo '' |
|
@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp |
|
@echo '' |
|
@echo 'Architecture specific targets ($(SRCARCH)):' |
|
@$(if $(archhelp),$(archhelp),\ |
|
echo ' No architecture specific help defined for $(SRCARCH)') |
|
@echo '' |
|
@$(if $(boards), \ |
|
$(foreach b, $(boards), \ |
|
printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ |
|
echo '') |
|
@$(if $(board-dirs), \ |
|
$(foreach b, $(board-dirs), \ |
|
printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ |
|
printf " %-16s - Show all of the above\\n" help-boards; \ |
|
echo '') |
|
|
|
@echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' |
|
@echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
|
@echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
|
@echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' |
|
@echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
|
@echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
|
@echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' |
|
@echo ' 1: warnings which may be relevant and do not occur too often' |
|
@echo ' 2: warnings which occur quite often but may still be relevant' |
|
@echo ' 3: more obscure warnings, can most likely be ignored' |
|
@echo ' Multiple levels can be combined with W=12 or W=123' |
|
@echo '' |
|
@echo 'Execute "make" or "make all" to build all targets marked with [*] ' |
|
@echo 'For further info see the ./README file' |
|
|
|
|
|
help-board-dirs := $(addprefix help-,$(board-dirs)) |
|
|
|
help-boards: $(help-board-dirs) |
|
|
|
boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
|
|
|
$(help-board-dirs): help-%: |
|
@echo 'Architecture specific targets ($(SRCARCH) $*):' |
|
@$(if $(boards-per-dir), \ |
|
$(foreach b, $(boards-per-dir), \ |
|
printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ |
|
echo '') |
|
|
|
|
|
# Documentation targets |
|
# --------------------------------------------------------------------------- |
|
DOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs |
|
PHONY += $(DOC_TARGETS) |
|
$(DOC_TARGETS): scripts_basic FORCE |
|
$(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype |
|
$(Q)$(MAKE) $(build)=Documentation -f $(srctree)/Documentation/Makefile.sphinx $@ |
|
$(Q)$(MAKE) $(build)=Documentation/DocBook $@ |
|
|
|
else # KBUILD_EXTMOD |
|
|
|
### |
|
# External module support. |
|
# When building external modules the kernel used as basis is considered |
|
# read-only, and no consistency checks are made and the make |
|
# system is not used on the basis kernel. If updates are required |
|
# in the basis kernel ordinary make commands (without M=...) must |
|
# be used. |
|
# |
|
# The following are the only valid targets when building external |
|
# modules. |
|
# make M=dir clean Delete all automatically generated files |
|
# make M=dir modules Make all modules in specified dir |
|
# make M=dir Same as 'make M=dir modules' |
|
# make M=dir modules_install |
|
# Install the modules built in the module directory |
|
# Assumes install directory is already created |
|
|
|
# We are always building modules |
|
KBUILD_MODULES := 1 |
|
PHONY += crmodverdir |
|
crmodverdir: |
|
$(cmd_crmodverdir) |
|
|
|
PHONY += $(objtree)/Module.symvers |
|
$(objtree)/Module.symvers: |
|
@test -e $(objtree)/Module.symvers || ( \ |
|
echo; \ |
|
echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ |
|
echo " is missing; modules will have no dependencies and modversions."; \ |
|
echo ) |
|
|
|
module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) |
|
PHONY += $(module-dirs) modules |
|
$(module-dirs): crmodverdir $(objtree)/Module.symvers |
|
$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) |
|
|
|
modules: $(module-dirs) |
|
@$(kecho) ' Building modules, stage 2.'; |
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
|
|
|
PHONY += modules_install |
|
modules_install: _emodinst_ _emodinst_post |
|
|
|
install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
|
PHONY += _emodinst_ |
|
_emodinst_: |
|
$(Q)mkdir -p $(MODLIB)/$(install-dir) |
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
|
|
|
PHONY += _emodinst_post |
|
_emodinst_post: _emodinst_ |
|
$(call cmd,depmod) |
|
|
|
clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
|
|
|
PHONY += $(clean-dirs) clean |
|
$(clean-dirs): |
|
$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
|
|
|
clean: rm-dirs := $(MODVERDIR) |
|
clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
|
|
|
PHONY += help |
|
help: |
|
@echo ' Building external modules.' |
|
@echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' |
|
@echo '' |
|
@echo ' modules - default target, build the module(s)' |
|
@echo ' modules_install - install the module' |
|
@echo ' clean - remove generated files in module directory only' |
|
@echo '' |
|
|
|
# Dummies... |
|
PHONY += prepare scripts |
|
prepare: ; |
|
scripts: ; |
|
endif # KBUILD_EXTMOD |
|
|
|
clean: $(clean-dirs) |
|
$(call cmd,rmdirs) |
|
$(call cmd,rmfiles) |
|
@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
|
\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
|
-o -name '*.ko.*' \ |
|
-o -name '*.dwo' \ |
|
-o -name '*.su' \ |
|
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
|
-o -name '*.symtypes' -o -name 'modules.order' \ |
|
-o -name modules.builtin -o -name '.tmp_*.o.*' \ |
|
-o -name '*.c.[012]*.*' \ |
|
-o -name '*.ll' \ |
|
-o -name '*.gcno' \ |
|
-o -name '*.*.symversions' \) -type f -print | xargs rm -f |
|
|
|
# Generate tags for editors |
|
# --------------------------------------------------------------------------- |
|
quiet_cmd_tags = GEN $@ |
|
cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ |
|
|
|
tags TAGS cscope gtags: FORCE |
|
$(call cmd,tags) |
|
|
|
# Scripts to check various things for consistency |
|
# --------------------------------------------------------------------------- |
|
|
|
PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
|
|
|
includecheck: |
|
find $(srctree)/* $(RCS_FIND_IGNORE) \ |
|
-name '*.[hcS]' -type f -print | sort \ |
|
| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
|
|
|
versioncheck: |
|
find $(srctree)/* $(RCS_FIND_IGNORE) \ |
|
-name '*.[hcS]' -type f -print | sort \ |
|
| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
|
|
|
coccicheck: |
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ |
|
|
|
namespacecheck: |
|
$(PERL) $(srctree)/scripts/namespace.pl |
|
|
|
export_report: |
|
$(PERL) $(srctree)/scripts/export_report.pl |
|
|
|
endif #ifeq ($(config-targets),1) |
|
endif #ifeq ($(mixed-targets),1) |
|
|
|
PHONY += checkstack kernelrelease kernelversion image_name |
|
|
|
# UML needs a little special treatment here. It wants to use the host |
|
# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone |
|
# else wants $(ARCH), including people doing cross-builds, which means |
|
# that $(SUBARCH) doesn't work here. |
|
ifeq ($(ARCH), um) |
|
CHECKSTACK_ARCH := $(SUBARCH) |
|
else |
|
CHECKSTACK_ARCH := $(ARCH) |
|
endif |
|
checkstack: |
|
$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ |
|
$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
|
|
|
kernelrelease: |
|
@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
|
|
|
kernelversion: |
|
@echo $(KERNELVERSION) |
|
|
|
image_name: |
|
@echo $(KBUILD_IMAGE) |
|
|
|
# Clear a bunch of variables before executing the submake |
|
tools/: FORCE |
|
$(Q)mkdir -p $(objtree)/tools |
|
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ |
|
|
|
tools/%: FORCE |
|
$(Q)mkdir -p $(objtree)/tools |
|
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $* |
|
|
|
# Single targets |
|
# --------------------------------------------------------------------------- |
|
# Single targets are compatible with: |
|
# - build with mixed source and output |
|
# - build with separate output dir 'make O=...' |
|
# - external modules |
|
# |
|
# target-dir => where to store outputfile |
|
# build-dir => directory in kernel source tree to use |
|
|
|
ifeq ($(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 |
|
|
|
targets := $(wildcard $(sort $(targets))) |
|
cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
|
|
|
ifneq ($(cmd_files),) |
|
$(cmd_files): ; # Do not try to update included dependency files |
|
include $(cmd_files) |
|
endif |
|
|
|
endif # skip-makefile |
|
|
|
PHONY += FORCE |
|
FORCE: |
|
|
|
# Declare the contents of the .PHONY variable as phony. We keep that |
|
# information in a variable so we can use it in if_changed and friends. |
|
.PHONY: $(PHONY) |
|
|
|
DROI_DEFINE =$(addprefix -D,$(shell echo $(CONFIG_DROI_PRO) | tr a-z A-Z)) |
|
KBUILD_CFLAGS += $(DROI_DEFINE) |
|
export KBUILD_CFLAGS |
|
|
|
DROI_CUSTOM_DEFINE =$(addprefix -D,$(shell echo $(CONFIG_DROI_PRO_CUSTOM) | tr a-z A-Z)) |
|
KBUILD_CFLAGS += $(DROI_CUSTOM_DEFINE) |
|
export KBUILD_CFLAGS |
|
|
|
DROI_CUSTOM_DEFINE_CHILD =$(addprefix -D,$(shell echo $(CONFIG_DROI_PRO_CUSTOM_CHILD) | tr a-z A-Z)) |
|
KBUILD_CFLAGS += $(DROI_CUSTOM_DEFINE_CHILD) |
|
export KBUILD_CFLAGS
|
|
|