# SPDX-License-Identifier: GPL-2.0
-VERSION = 5
-PATCHLEVEL = 1
+VERSION = 6
+PATCHLEVEL = 9
SUBLEVEL = 0
-EXTRAVERSION =
-NAME = Shy Crocodile
+EXTRAVERSION = -rc4
+NAME = Hurr durr I'ma ninja sloth
# *DOCUMENTATION*
# To see a list of typical targets execute "make help"
# Comments in this file are targeted only to the developer, do not
# expect to learn how to build the kernel reading this file.
+ifeq ($(filter undefine,$(.FEATURES)),)
+$(error GNU Make >= 3.82 is required. Your Make version is $(MAKE_VERSION))
+endif
+
+$(if $(filter __%, $(MAKECMDGOALS)), \
+ $(error targets prefixed with '__' are only for internal use))
+
# That's our default target when none is given on the command line
-PHONY := _all
-_all:
+PHONY := __all
+__all:
# We are using a recursive build, so we need to do a little thinking
# to get the ordering right.
# descending is started. They are now explicitly listed as the
# prepare rule.
+this-makefile := $(lastword $(MAKEFILE_LIST))
+abs_srctree := $(realpath $(dir $(this-makefile)))
+abs_objtree := $(CURDIR)
+
ifneq ($(sub_make_done),1)
# Do not use make's built-in rules and variables
# 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 $@ $<
+# Most of build commands in Kbuild start with "cmd_". You can optionally define
+# "quiet_cmd_*". If defined, the short log is printed. Otherwise, no log from
+# that command is printed by default.
#
-# 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.
+# e.g.)
+# quiet_cmd_depmod = DEPMOD $(MODLIB)
+# cmd_depmod = $(srctree)/scripts/depmod.sh $(DEPMOD) $(KERNELRELEASE)
#
# A simple variant is to prefix commands with $(Q) - that's useful
# for commands that shall be hidden in non-verbose mode.
#
-# $(Q)ln $@ :<
+# $(Q)$(MAKE) $(build)=scripts/basic
#
-# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
-# If KBUILD_VERBOSE equals 1 then the above command is displayed.
+# If KBUILD_VERBOSE contains 1, the whole command is echoed.
+# If KBUILD_VERBOSE contains 2, the reason for rebuilding is printed.
#
# To put more focus on warnings, be less verbose as default
# Use 'make V=1' to see the full commands
ifeq ("$(origin V)", "command line")
KBUILD_VERBOSE = $(V)
endif
-ifndef KBUILD_VERBOSE
- KBUILD_VERBOSE = 0
-endif
-ifeq ($(KBUILD_VERBOSE),1)
+quiet = quiet_
+Q = @
+
+ifneq ($(findstring 1, $(KBUILD_VERBOSE)),)
quiet =
Q =
-else
- quiet=quiet_
- Q = @
endif
# If the user is running make -s (silent mode), suppress echoing of
# commands
+# make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS.
+
+ifeq ($(filter 3.%,$(MAKE_VERSION)),)
+short-opts := $(firstword -$(MAKEFLAGS))
+else
+short-opts := $(filter-out --%,$(MAKEFLAGS))
+endif
-ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
- quiet=silent_
+ifneq ($(findstring s,$(short-opts)),)
+quiet=silent_
+override KBUILD_VERBOSE :=
endif
export quiet Q KBUILD_VERBOSE
+# Call a source code checker (by default, "sparse") as part of the
+# C compilation.
+#
+# Use 'make C=1' to enable checking of only re-compiled files.
+# Use 'make C=2' to enable checking of *all* source files, regardless
+# of whether they are re-compiled or not.
+#
+# See the file "Documentation/dev-tools/sparse.rst" for more details,
+# including where to get the "sparse" utility.
+
+ifeq ("$(origin C)", "command line")
+ KBUILD_CHECKSRC = $(C)
+endif
+ifndef KBUILD_CHECKSRC
+ KBUILD_CHECKSRC = 0
+endif
+
+export KBUILD_CHECKSRC
+
+# Enable "clippy" (a linter) as part of the Rust compilation.
+#
+# Use 'make CLIPPY=1' to enable it.
+ifeq ("$(origin CLIPPY)", "command line")
+ KBUILD_CLIPPY := $(CLIPPY)
+endif
+
+export KBUILD_CLIPPY
+
+# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
+# directory of external module to build. Setting M= takes precedence.
+ifeq ("$(origin M)", "command line")
+ KBUILD_EXTMOD := $(M)
+endif
+
+$(if $(word 2, $(KBUILD_EXTMOD)), \
+ $(error building multiple external modules is not supported))
+
+$(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \
+ $(error module directory path cannot contain '$x')))
+
+# Remove trailing slashes
+ifneq ($(filter %/, $(KBUILD_EXTMOD)),)
+KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).)
+endif
+
+export KBUILD_EXTMOD
+
+# backward compatibility
+KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)
+
+ifeq ("$(origin W)", "command line")
+ KBUILD_EXTRA_WARN := $(W)
+endif
+
+export KBUILD_EXTRA_WARN
+
# Kbuild will save output files in the current working directory.
# This does not need to match to the root of the kernel source tree.
#
endif
ifneq ($(KBUILD_OUTPUT),)
-# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
-# expand a shell special character '~'. We use a somewhat tedious way here.
-abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
-$(if $(abs_objtree),, \
- $(error failed to create output directory "$(KBUILD_OUTPUT)"))
-
+# $(realpath ...) gets empty if the path does not exist. Run 'mkdir -p' first.
+$(shell mkdir -p "$(KBUILD_OUTPUT)")
# $(realpath ...) resolves symlinks
-abs_objtree := $(realpath $(abs_objtree))
-else
-abs_objtree := $(CURDIR)
+abs_objtree := $(realpath $(KBUILD_OUTPUT))
+$(if $(abs_objtree),,$(error failed to create output directory "$(KBUILD_OUTPUT)"))
endif # ifneq ($(KBUILD_OUTPUT),)
-ifeq ($(abs_objtree),$(CURDIR))
-# Suppress "Entering directory ..." unless we are changing the work directory.
-MAKEFLAGS += --no-print-directory
-else
-need-sub-make := 1
-endif
-
-abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
-
ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
$(error source directory cannot contain spaces or colons)
endif
-ifneq ($(abs_srctree),$(abs_objtree))
-# Look for make include files relative to root of kernel src
-#
-# This does not become effective immediately because MAKEFLAGS is re-parsed
-# once after the Makefile is read. We need to invoke sub-make.
-MAKEFLAGS += --include-dir=$(abs_srctree)
-need-sub-make := 1
-endif
-
ifneq ($(filter 3.%,$(MAKE_VERSION)),)
# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
# We need to invoke sub-make to avoid implicit rules in the top Makefile.
need-sub-make := 1
# Cancel implicit rules for this Makefile.
-$(lastword $(MAKEFILE_LIST)): ;
+$(this-makefile): ;
endif
-export abs_srctree abs_objtree
export sub_make_done := 1
+endif # sub_make_done
+
+ifeq ($(abs_objtree),$(CURDIR))
+# Suppress "Entering directory ..." if we are at the final work directory.
+no-print-directory := --no-print-directory
+else
+# Recursion to show "Entering directory ..."
+need-sub-make := 1
+endif
+
+ifeq ($(filter --no-print-directory, $(MAKEFLAGS)),)
+# If --no-print-directory is unset, recurse once again to set it.
+# You may end up recursing into __sub-make twice. This is needed due to the
+# behavior change in GNU Make 4.4.1.
+need-sub-make := 1
+endif
+
ifeq ($(need-sub-make),1)
-PHONY += $(MAKECMDGOALS) sub-make
+PHONY += $(MAKECMDGOALS) __sub-make
-$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make
+$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
@:
# Invoke a second make in the output directory, passing relevant variables
-sub-make:
- $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
+__sub-make:
+ $(Q)$(MAKE) $(no-print-directory) -C $(abs_objtree) \
+ -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
-endif # need-sub-make
-endif # sub_make_done
+else # need-sub-make
# We process the rest of the Makefile if this is the final invocation of make
-ifeq ($(need-sub-make),)
-
-# 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/dev-tools/sparse.rst" 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
- $(warning ================= WARNING ================)
- $(warning 'SUBDIRS' will be removed after Linux 5.3)
- $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead)
- $(warning ==========================================)
- KBUILD_EXTMOD ?= $(SUBDIRS)
-endif
-
-ifeq ("$(origin M)", "command line")
- KBUILD_EXTMOD := $(M)
-endif
ifeq ($(abs_srctree),$(abs_objtree))
# building in the source tree
srctree := .
+ building_out_of_srctree :=
else
ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
# building in a subdirectory of the source tree
else
srctree := $(abs_srctree)
endif
-
- # TODO:
- # KBUILD_SRC is only used to distinguish in-tree/out-of-tree build.
- # Replace it with $(srctree) or something.
- KBUILD_SRC := $(abs_srctree)
+ building_out_of_srctree := 1
endif
-export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC
+ifneq ($(KBUILD_ABS_SRCTREE),)
+srctree := $(abs_srctree)
+endif
objtree := .
-src := $(srctree)
-obj := $(objtree)
-
VPATH := $(srctree)
-export srctree objtree VPATH
+export building_out_of_srctree srctree objtree VPATH
# 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
# 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
clean-targets := %clean mrproper cleandocs
no-dot-config-targets := $(clean-targets) \
cscope gtags TAGS tags help% %docs check% coccicheck \
- $(version_h) headers_% archheaders archscripts \
- %asm-generic kernelversion %src-pkg
-no-sync-config-targets := $(no-dot-config-targets) install %install \
- kernelrelease
-
-config-targets := 0
-mixed-targets := 0
-dot-config := 1
-may-sync-config := 1
+ $(version_h) headers headers_% archheaders archscripts \
+ %asm-generic kernelversion %src-pkg dt_binding_check \
+ outputmakefile rustavailable rustfmt rustfmtcheck
+no-sync-config-targets := $(no-dot-config-targets) %install modules_sign kernelrelease \
+ image_name
+single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/
+
+config-build :=
+mixed-build :=
+need-config := 1
+may-sync-config := 1
+single-build :=
ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
- ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
- dot-config := 0
- endif
+ ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
+ need-config :=
+ endif
endif
ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
- ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
- may-sync-config := 0
- endif
+ ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
+ may-sync-config :=
+ endif
endif
+need-compiler := $(may-sync-config)
+
ifneq ($(KBUILD_EXTMOD),)
- may-sync-config := 0
+ may-sync-config :=
endif
ifeq ($(KBUILD_EXTMOD),)
- ifneq ($(filter config %config,$(MAKECMDGOALS)),)
- config-targets := 1
- ifneq ($(words $(MAKECMDGOALS)),1)
- mixed-targets := 1
- endif
+ ifneq ($(filter %config,$(MAKECMDGOALS)),)
+ config-build := 1
+ ifneq ($(words $(MAKECMDGOALS)),1)
+ mixed-build := 1
endif
+ endif
+endif
+
+# We cannot build single targets and the others at the same time
+ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
+ single-build := 1
+ ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
+ mixed-build := 1
+ endif
endif
# For "make -j clean all", "make -j mrproper defconfig all", etc.
ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
- ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
- mixed-targets := 1
- endif
+ ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
+ mixed-build := 1
+ endif
endif
# install and modules_install need also be processed one by one
ifneq ($(filter install,$(MAKECMDGOALS)),)
- ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
- mixed-targets := 1
- endif
+ ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
+ mixed-build := 1
+ endif
endif
-ifeq ($(mixed-targets),1)
+ifdef mixed-build
# ===========================================================================
# 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, $(MAKECMDGOALS)): __build_one_by_one
+$(MAKECMDGOALS): __build_one_by_one
@:
__build_one_by_one:
$(MAKE) -f $(srctree)/Makefile $$i; \
done
-else
+else # !mixed-build
-include scripts/Kbuild.include
+include $(srctree)/scripts/Kbuild.include
# Read KERNELRELEASE from include/config/kernel.release (if it exists)
-KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
+KERNELRELEASE = $(call read-file, include/config/kernel.release)
KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
-include scripts/subarch.include
+include $(srctree)/scripts/subarch.include
# Cross compiling and selecting different set of gcc/bin-utils
# ---------------------------------------------------------------------------
# When performing cross compilation for other architectures ARCH shall be set
# to the target architecture. (See arch/* for the possibilities).
# ARCH can be set during invocation of make:
-# make ARCH=ia64
+# make ARCH=arm64
# Another way is to have ARCH set in the environment.
# The default ARCH is the host where make is executed.
# during compilation. Only gcc and related bin-utils executables
# are prefixed with $(CROSS_COMPILE).
# CROSS_COMPILE can be set on the command line
-# make CROSS_COMPILE=ia64-linux-
+# make CROSS_COMPILE=aarch64-linux-gnu-
# Alternatively CROSS_COMPILE can be set in the environment.
# Default value for CROSS_COMPILE is not to prefix executables
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
SRCARCH := sparc
endif
-# Additional ARCH settings for sh
-ifeq ($(ARCH),sh64)
- SRCARCH := sh
+# Additional ARCH settings for parisc
+ifeq ($(ARCH),parisc64)
+ SRCARCH := parisc
+endif
+
+export cross_compiling :=
+ifneq ($(SRCARCH),$(SUBARCH))
+cross_compiling := 1
endif
KCONFIG_CONFIG ?= .config
export KCONFIG_CONFIG
# SHELL used by kbuild
-CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
- else if [ -x /bin/bash ]; then echo /bin/bash; \
- else echo sh; fi ; fi)
+CONFIG_SHELL := sh
HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
-HOSTCC = gcc
-HOSTCXX = g++
-KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
- -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
- $(HOSTCFLAGS)
-KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
+ifneq ($(LLVM),)
+ifneq ($(filter %/,$(LLVM)),)
+LLVM_PREFIX := $(LLVM)
+else ifneq ($(filter -%,$(LLVM)),)
+LLVM_SUFFIX := $(LLVM)
+endif
+
+HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
+HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)
+else
+HOSTCC = gcc
+HOSTCXX = g++
+endif
+HOSTRUSTC = rustc
+HOSTPKG_CONFIG = pkg-config
+
+KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
+ -O2 -fomit-frame-pointer -std=gnu11
+KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS)
+KBUILD_USERLDFLAGS := $(USERLDFLAGS)
+
+# These flags apply to all Rust code in the tree, including the kernel and
+# host programs.
+export rust_common_flags := --edition=2021 \
+ -Zbinary_dep_depinfo=y \
+ -Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \
+ -Dunreachable_pub -Dnon_ascii_idents \
+ -Wmissing_docs \
+ -Drustdoc::missing_crate_level_docs \
+ -Dclippy::correctness -Dclippy::style \
+ -Dclippy::suspicious -Dclippy::complexity \
+ -Dclippy::perf \
+ -Dclippy::let_unit_value -Dclippy::mut_mut \
+ -Dclippy::needless_bitwise_bool \
+ -Dclippy::needless_continue \
+ -Dclippy::no_mangle_with_rust_abi \
+ -Wclippy::dbg_macro
+
+KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
+KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
+KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \
+ -Zallow-features= $(HOSTRUSTFLAGS)
KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
# Make variables (CC, etc...)
-AS = $(CROSS_COMPILE)as
-LD = $(CROSS_COMPILE)ld
-CC = $(CROSS_COMPILE)gcc
CPP = $(CC) -E
+ifneq ($(LLVM),)
+CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
+LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX)
+AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX)
+NM = $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX)
+OBJCOPY = $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX)
+OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX)
+READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX)
+STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX)
+else
+CC = $(CROSS_COMPILE)gcc
+LD = $(CROSS_COMPILE)ld
AR = $(CROSS_COMPILE)ar
NM = $(CROSS_COMPILE)nm
-STRIP = $(CROSS_COMPILE)strip
OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
+READELF = $(CROSS_COMPILE)readelf
+STRIP = $(CROSS_COMPILE)strip
+endif
+RUSTC = rustc
+RUSTDOC = rustdoc
+RUSTFMT = rustfmt
+CLIPPY_DRIVER = clippy-driver
+BINDGEN = bindgen
+CARGO = cargo
PAHOLE = pahole
+RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
LEX = flex
YACC = bison
AWK = awk
INSTALLKERNEL := installkernel
-DEPMOD = /sbin/depmod
PERL = perl
-PYTHON = python
-PYTHON2 = python2
PYTHON3 = python3
CHECK = sparse
+BASH = bash
+KGZIP = gzip
+KBZIP2 = bzip2
+KLZOP = lzop
+LZMA = lzma
+LZ4 = lz4c
+XZ = xz
+ZSTD = zstd
CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
-Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
NOSTDINC_FLAGS :=
CFLAGS_MODULE =
+RUSTFLAGS_MODULE =
AFLAGS_MODULE =
LDFLAGS_MODULE =
CFLAGS_KERNEL =
+RUSTFLAGS_KERNEL =
AFLAGS_KERNEL =
LDFLAGS_vmlinux =
-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
-I$(srctree)/include/uapi \
-I$(objtree)/include/generated/uapi \
+ -include $(srctree)/include/linux/compiler-version.h \
-include $(srctree)/include/linux/kconfig.h
# Use LINUXINCLUDE when you must reference the include/ directory.
LINUXINCLUDE := \
-I$(srctree)/arch/$(SRCARCH)/include \
-I$(objtree)/arch/$(SRCARCH)/include/generated \
- $(if $(filter .,$(srctree)),,-I$(srctree)/include) \
+ $(if $(building_out_of_srctree),-I$(srctree)/include) \
-I$(objtree)/include \
$(USERINCLUDE)
KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
-KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
- -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
- -Werror=implicit-function-declaration -Werror=implicit-int \
- -Wno-format-security \
- -std=gnu89
+
+KBUILD_CFLAGS :=
+KBUILD_CFLAGS += -std=gnu11
+KBUILD_CFLAGS += -fshort-wchar
+KBUILD_CFLAGS += -funsigned-char
+KBUILD_CFLAGS += -fno-common
+KBUILD_CFLAGS += -fno-PIE
+KBUILD_CFLAGS += -fno-strict-aliasing
+
KBUILD_CPPFLAGS := -D__KERNEL__
+KBUILD_RUSTFLAGS := $(rust_common_flags) \
+ -Cpanic=abort -Cembed-bitcode=n -Clto=n \
+ -Cforce-unwind-tables=n -Ccodegen-units=1 \
+ -Csymbol-mangling-version=v0 \
+ -Crelocation-model=static \
+ -Zfunction-sections=n \
+ -Dclippy::float_arithmetic
+
KBUILD_AFLAGS_KERNEL :=
KBUILD_CFLAGS_KERNEL :=
+KBUILD_RUSTFLAGS_KERNEL :=
KBUILD_AFLAGS_MODULE := -DMODULE
KBUILD_CFLAGS_MODULE := -DMODULE
-KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
+KBUILD_RUSTFLAGS_MODULE := --cfg MODULE
+KBUILD_LDFLAGS_MODULE :=
KBUILD_LDFLAGS :=
-GCC_PLUGINS_CFLAGS :=
+CLANG_FLAGS :=
-export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
-export CPP AR NM STRIP OBJCOPY OBJDUMP PAHOLE KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS
-export MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE
-export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
+ifeq ($(KBUILD_CLIPPY),1)
+ RUSTC_OR_CLIPPY_QUIET := CLIPPY
+ RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER)
+else
+ RUSTC_OR_CLIPPY_QUIET := RUSTC
+ RUSTC_OR_CLIPPY = $(RUSTC)
+endif
+
+ifdef RUST_LIB_SRC
+ export RUST_LIB_SRC
+endif
+
+# Allows the usage of unstable features in stable compilers.
+export RUSTC_BOOTSTRAP := 1
+
+export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG
+export RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO
+export HOSTRUSTC KBUILD_HOSTRUSTFLAGS
+export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
+export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
+export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
+export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
+export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
-export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
+export KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE
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
+export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE
+export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL
# 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
PHONY += scripts_basic
scripts_basic:
$(Q)$(MAKE) $(build)=scripts/basic
- $(Q)rm -f .tmp_quiet_recordmcount
PHONY += outputmakefile
+ifdef building_out_of_srctree
+# Before starting out-of-tree build, make sure the source tree is clean.
# outputmakefile generates a Makefile in the output directory, if using a
# separate output directory. This allows convenient use of make in the
# output directory.
# At the same time when output Makefile generated, generate .gitignore to
# ignore whole output directory
+
+quiet_cmd_makefile = GEN Makefile
+ cmd_makefile = { \
+ echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
+ echo "include $(srctree)/Makefile"; \
+ } > Makefile
+
outputmakefile:
-ifneq ($(srctree),.)
+ @if [ -f $(srctree)/.config -o \
+ -d $(srctree)/include/config -o \
+ -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
+ echo >&2 "***"; \
+ echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
+ echo >&2 "*** in $(abs_srctree)";\
+ echo >&2 "***"; \
+ false; \
+ fi
$(Q)ln -fsn $(srctree) source
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
+ $(call cmd,makefile)
$(Q)test -e .gitignore || \
{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
endif
-ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
-ifneq ($(CROSS_COMPILE),)
-CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%))
-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
-KBUILD_CFLAGS += $(CLANG_FLAGS)
-KBUILD_AFLAGS += $(CLANG_FLAGS)
-export CLANG_FLAGS
-endif
-
# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
# and from include/config/auto.conf.cmd to detect the compiler upgrade.
-CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1)
+CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
+
+ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
+include $(srctree)/scripts/Makefile.clang
+endif
-ifeq ($(config-targets),1)
+# Include this also for config targets because some architectures need
+# cc-cross-prefix to determine CROSS_COMPILE.
+ifdef need-compiler
+include $(srctree)/scripts/Makefile.compiler
+endif
+
+ifdef config-build
# ===========================================================================
# *config targets only - make sure prerequisites are updated, and descend
# in scripts/kconfig to make the *config target
-# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
+# Read arch-specific Makefile to set KBUILD_DEFCONFIG as needed.
# KBUILD_DEFCONFIG may point out an alternative default configuration
# used for 'make defconfig'
-include arch/$(SRCARCH)/Makefile
+include $(srctree)/arch/$(SRCARCH)/Makefile
export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
-config: scripts_basic outputmakefile FORCE
+config: outputmakefile scripts_basic FORCE
$(Q)$(MAKE) $(build)=scripts/kconfig $@
-%config: scripts_basic outputmakefile FORCE
+%config: outputmakefile scripts_basic FORCE
$(Q)$(MAKE) $(build)=scripts/kconfig $@
-else
+else #!config-build
# ===========================================================================
-# Build targets only - this includes vmlinux, arch specific targets, clean
+# Build targets only - this includes vmlinux, arch-specific targets, clean
# targets and others. In general all targets except *config targets.
# If building an external module we do not care about the all: rule
-# but instead _all depend on modules
+# but instead __all depend on modules
PHONY += all
ifeq ($(KBUILD_EXTMOD),)
-_all: all
+__all: all
else
-_all: modules
+__all: modules
endif
+targets :=
+
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.
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 $(CONFIG_MODVERSIONS),1)
+ KBUILD_BUILTIN :=
endif
# If we have "make <whatever> modules", compile modules
# in addition to whatever we do anyway.
# Just "make" or "make all" shall build modules as well
-ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
+ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
KBUILD_MODULES := 1
endif
export KBUILD_MODULES KBUILD_BUILTIN
-ifeq ($(dot-config),1)
+ifdef need-config
include include/config/auto.conf
endif
ifeq ($(KBUILD_EXTMOD),)
# Objects we will link into vmlinux / subdirs we need to visit
-init-y := init/
-drivers-y := drivers/ sound/
-drivers-$(CONFIG_SAMPLES) += samples/
-net-y := net/
+core-y :=
+drivers-y :=
libs-y := lib/
-core-y := usr/
-virt-y := virt/
endif # KBUILD_EXTMOD
# The all: target is the default when no target is given on the
# Defaults to vmlinux, but the arch makefile usually adds further targets
all: vmlinux
-CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
- $(call cc-option,-fno-tree-loop-im) \
- $(call cc-disable-warning,maybe-uninitialized,)
+CFLAGS_GCOV := -fprofile-arcs -ftest-coverage
+ifdef CONFIG_CC_IS_GCC
+CFLAGS_GCOV += -fno-tree-loop-im
+endif
export CFLAGS_GCOV
# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
CC_FLAGS_FTRACE := -pg
endif
-RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
-RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
-RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
-RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
-RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
-RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
-export RETPOLINE_CFLAGS
-export RETPOLINE_VDSO_CFLAGS
-
-# 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/$(SRCARCH)/Makefile
-
-ifeq ($(dot-config),1)
-ifeq ($(may-sync-config),1)
+include $(srctree)/arch/$(SRCARCH)/Makefile
+
+ifdef need-config
+ifdef may-sync-config
# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
# because some architectures define CROSS_COMPILE there.
--include include/config/auto.conf.cmd
+include include/config/auto.conf.cmd
$(KCONFIG_CONFIG):
@echo >&2 '***'
#
# This exploits the 'multi-target pattern rule' trick.
# The syncconfig should be executed only once to make all the targets.
-%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG)
+# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
+#
+# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
+# so you cannot notice that Kconfig is waiting for the user input.
+%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG)
+ $(Q)$(kecho) " SYNC $@"
$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
-else
+else # !may-sync-config
# External modules and some install targets need 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 $@ || ( \
+ @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.";\
/bin/false)
endif # may-sync-config
-endif # $(dot-config)
+endif # need-config
-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 += $(call cc-disable-warning, address-of-packed-member)
+KBUILD_CFLAGS += -fno-delete-null-pointer-checks
-ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
-KBUILD_CFLAGS += -Os
-else
-KBUILD_CFLAGS += -O2
+ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
+KBUILD_CFLAGS += -O2
+KBUILD_RUSTFLAGS += -Copt-level=2
+else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
+KBUILD_CFLAGS += -Os
+KBUILD_RUSTFLAGS += -Copt-level=s
endif
-ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED
-KBUILD_CFLAGS += -Wno-maybe-uninitialized
-endif
+# Always set `debug-assertions` and `overflow-checks` because their default
+# depends on `opt-level` and `debug-assertions`, respectively.
+KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n)
+KBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n)
# Tell gcc to never replace conditional load with a non-conditional one
+ifdef CONFIG_CC_IS_GCC
+# gcc-10 renamed --param=allow-store-data-races=0 to
+# -fno-allow-store-data-races.
KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
-
-include scripts/Makefile.kcov
-include scripts/Makefile.gcc-plugins
+KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
+endif
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})
+KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
endif
-stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
+stackp-flags-y := -fno-stack-protector
stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
KBUILD_CFLAGS += $(stackp-flags-y)
-ifdef CONFIG_CC_IS_CLANG
-KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
-KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
-KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
-# 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 += $(call cc-option, -fcatch-undefined-behavior)
-else
+KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings
+KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)
-# These warnings generated too much noise in a regular build.
-# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
-KBUILD_CFLAGS += -Wno-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
+KBUILD_RUSTFLAGS += -Cforce-frame-pointers=y
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.
+# In the Rust target specification, "frame-pointer" is set explicitly
+# to "may-omit".
ifndef CONFIG_FUNCTION_TRACER
KBUILD_CFLAGS += -fomit-frame-pointer
endif
endif
-# Initialize all stack variables with a pattern, if desired.
-ifdef CONFIG_INIT_STACK_ALL
+# Initialize all stack variables with a 0xAA pattern.
+ifdef CONFIG_INIT_STACK_ALL_PATTERN
KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern
endif
-DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments)
-
-ifdef CONFIG_DEBUG_INFO
-ifdef CONFIG_DEBUG_INFO_SPLIT
-DEBUG_CFLAGS += -gsplit-dwarf
-else
-DEBUG_CFLAGS += -g
+# Initialize all stack variables with a zero value.
+ifdef CONFIG_INIT_STACK_ALL_ZERO
+KBUILD_CFLAGS += -ftrivial-auto-var-init=zero
+ifdef CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_ENABLER
+# https://github.com/llvm/llvm-project/issues/44842
+CC_AUTO_VAR_INIT_ZERO_ENABLER := -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
+export CC_AUTO_VAR_INIT_ZERO_ENABLER
+KBUILD_CFLAGS += $(CC_AUTO_VAR_INIT_ZERO_ENABLER)
endif
-KBUILD_AFLAGS += -Wa,-gdwarf-2
-endif
-ifdef CONFIG_DEBUG_INFO_DWARF4
-DEBUG_CFLAGS += -gdwarf-4
endif
-ifdef CONFIG_DEBUG_INFO_REDUCED
-DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
- $(call cc-option,-fno-var-tracking)
-endif
+# While VLAs have been removed, GCC produces unreachable stack probes
+# for the randomize_kstack_offset feature. Disable it for all compilers.
+KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection)
-KBUILD_CFLAGS += $(DEBUG_CFLAGS)
-export DEBUG_CFLAGS
+# Clear used registers at func exit (to reduce data lifetime and ROP gadgets).
+ifdef CONFIG_ZERO_CALL_USED_REGS
+KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr
+endif
ifdef CONFIG_FUNCTION_TRACER
-ifdef CONFIG_FTRACE_MCOUNT_RECORD
- # gcc 5 supports generating the mcount tables directly
- ifeq ($(call cc-option-yn,-mrecord-mcount),y)
- CC_FLAGS_FTRACE += -mrecord-mcount
- export CC_USING_RECORD_MCOUNT := 1
- endif
+ifdef CONFIG_FTRACE_MCOUNT_USE_CC
+ CC_FLAGS_FTRACE += -mrecord-mcount
ifdef CONFIG_HAVE_NOP_MCOUNT
ifeq ($(call cc-option-yn, -mnop-mcount),y)
CC_FLAGS_FTRACE += -mnop-mcount
endif
endif
endif
+ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
+ ifdef CONFIG_HAVE_OBJTOOL_NOP_MCOUNT
+ CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
+ endif
+endif
+ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
+ ifdef CONFIG_HAVE_C_RECORDMCOUNT
+ BUILD_C_RECORDMCOUNT := y
+ export BUILD_C_RECORDMCOUNT
+ endif
+endif
ifdef CONFIG_HAVE_FENTRY
+ # s390-linux-gnu-gcc did not support -mfentry until gcc-9.
ifeq ($(call cc-option-yn, -mfentry),y)
CC_FLAGS_FTRACE += -mfentry
CC_FLAGS_USING += -DCC_USING_FENTRY
export CC_FLAGS_FTRACE
KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
KBUILD_AFLAGS += $(CC_FLAGS_USING)
-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)
+KBUILD_CFLAGS += -fno-inline-functions-called-once
endif
+# `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0).
ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
+KBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y
LDFLAGS_vmlinux += --gc-sections
endif
-ifdef CONFIG_LIVEPATCH
-KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone)
+ifdef CONFIG_SHADOW_CALL_STACK
+ifndef CONFIG_DYNAMIC_SCS
+CC_FLAGS_SCS := -fsanitize=shadow-call-stack
+KBUILD_CFLAGS += $(CC_FLAGS_SCS)
+endif
+export CC_FLAGS_SCS
endif
-# arch Makefile may override CC so keep this after arch Makefile is included
-NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
+ifdef CONFIG_LTO_CLANG
+ifdef CONFIG_LTO_CLANG_THIN
+CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit
+KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
+else
+CC_FLAGS_LTO := -flto
+endif
+CC_FLAGS_LTO += -fvisibility=hidden
+
+# Limit inlining across translation units to reduce binary size
+KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
+endif
-# warn about C99 declaration after statement
-KBUILD_CFLAGS += -Wdeclaration-after-statement
+ifdef CONFIG_LTO
+KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO)
+KBUILD_AFLAGS += -fno-lto
+export CC_FLAGS_LTO
+endif
-# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
-KBUILD_CFLAGS += $(call cc-option,-Wvla)
+ifdef CONFIG_CFI_CLANG
+CC_FLAGS_CFI := -fsanitize=kcfi
+KBUILD_CFLAGS += $(CC_FLAGS_CFI)
+export CC_FLAGS_CFI
+endif
-# disable pointer signed / unsigned warnings in gcc 4.0
-KBUILD_CFLAGS += -Wno-pointer-sign
+ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0)
+# Set the minimal function alignment. Use the newer GCC option
+# -fmin-function-alignment if it is available, or fall back to -falign-funtions.
+# See also CONFIG_CC_HAS_SANE_FUNCTION_ALIGNMENT.
+ifdef CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT
+KBUILD_CFLAGS += -fmin-function-alignment=$(CONFIG_FUNCTION_ALIGNMENT)
+else
+KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT)
+endif
+endif
-# disable stringop warnings in gcc 8+
-KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
+# arch Makefile may override CC so keep this after arch Makefile is included
+NOSTDINC_FLAGS += -nostdinc
-# disable invalid "can't wrap" optimizations for signed / pointers
-KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
+# To gain proper coverage for CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE,
+# the kernel uses only C99 flexible arrays for dynamically sized trailing
+# arrays. Enforce this for everything that may examine structure sizes and
+# perform bounds checking.
+KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3)
-# 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 += $(call cc-option,-fno-merge-all-constants)
+#Currently, disable -Wstringop-overflow for GCC 11, globally.
+KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW) += $(call cc-option, -Wno-stringop-overflow)
+KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) += $(call cc-option, -Wstringop-overflow)
-# 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)
+# disable invalid "can't wrap" optimizations for signed / pointers
+KBUILD_CFLAGS += -fno-strict-overflow
# Make sure -fstack-check isn't enabled (like gentoo apparently did)
-KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,)
+KBUILD_CFLAGS += -fno-stack-check
# conserve stack if available
-KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
-
-# Prohibit date/time macros, which would make the build non-deterministic
-KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
+ifdef CONFIG_CC_IS_GCC
+KBUILD_CFLAGS += -fconserve-stack
+endif
-# enforce correct pointer usage
-KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
+# change __FILE__ to the relative path from the srctree
+KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
-# Require designated initializers for all marked structures
-KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
+# include additional Makefiles when needed
+include-y := scripts/Makefile.extrawarn
+include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug
+include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Makefile.btf
+include-$(CONFIG_KASAN) += scripts/Makefile.kasan
+include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan
+include-$(CONFIG_KMSAN) += scripts/Makefile.kmsan
+include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan
+include-$(CONFIG_KCOV) += scripts/Makefile.kcov
+include-$(CONFIG_RANDSTRUCT) += scripts/Makefile.randstruct
+include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins
-# change __FILE__ to the relative path from the srctree
-KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
+include $(addprefix $(srctree)/, $(include-y))
-# use the deterministic mode of AR if available
-KBUILD_ARFLAGS := $(call ar-option,D)
+# scripts/Makefile.gcc-plugins is intentionally included last.
+# Do not add $(call cc-option,...) below this line. When you build the kernel
+# from the clean source tree, the GCC plugins do not exist at this point.
-include scripts/Makefile.kasan
-include scripts/Makefile.extrawarn
-include scripts/Makefile.ubsan
+# Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments
+KBUILD_CPPFLAGS += $(KCPPFLAGS)
+KBUILD_AFLAGS += $(KAFLAGS)
+KBUILD_CFLAGS += $(KCFLAGS)
+KBUILD_RUSTFLAGS += $(KRUSTFLAGS)
-# 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)
+KBUILD_LDFLAGS_MODULE += --build-id=sha1
+LDFLAGS_vmlinux += --build-id=sha1
-# Use --build-id when available.
-LDFLAGS_BUILD_ID := $(call ld-option, --build-id)
-KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
-LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
+KBUILD_LDFLAGS += -z noexecstack
+ifeq ($(CONFIG_LD_IS_BFD),y)
+KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments)
+endif
ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
-LDFLAGS_vmlinux += $(call ld-option, -X,)
+LDFLAGS_vmlinux += -X
endif
+ifeq ($(CONFIG_RELR),y)
+# ld.lld before 15 did not support -z pack-relative-relocs.
+LDFLAGS_vmlinux += $(call ld-option,--pack-dyn-relocs=relr,-z pack-relative-relocs)
+endif
+
+# We never want expected sections to be placed heuristically by the
+# linker. All sections should be explicitly named in the linker script.
+ifdef CONFIG_LD_ORPHAN_WARN
+LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
+endif
+
+# Align the bit size of userspace programs with the kernel
+KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
+KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
+
+# make the checker run with the right architecture
+CHECKFLAGS += --arch=$(ARCH)
+
# insure the checker run with the right endianness
CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
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) $(INSTALL_MOD_STRIP)
-endif # INSTALL_MOD_STRIP=1
-else
-mod_strip_cmd = true
-endif # INSTALL_MOD_STRIP
-export mod_strip_cmd
-
-# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
-# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
-# or CONFIG_MODULE_COMPRESS_XZ.
-
-mod_compress_cmd = true
-ifdef CONFIG_MODULE_COMPRESS
- ifdef CONFIG_MODULE_COMPRESS_GZIP
- mod_compress_cmd = gzip -n -f
- endif # CONFIG_MODULE_COMPRESS_GZIP
- ifdef CONFIG_MODULE_COMPRESS_XZ
- mod_compress_cmd = xz -f
- endif # CONFIG_MODULE_COMPRESS_XZ
-endif # CONFIG_MODULE_COMPRESS
-export mod_compress_cmd
-
-ifdef CONFIG_MODULE_SIG_ALL
-$(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
-
-HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
-
-ifdef CONFIG_STACK_VALIDATION
- has_libelf := $(call try-run,\
- echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
- ifeq ($(has_libelf),1)
- objtool_target := tools/objtool FORCE
- else
- SKIP_STACK_VALIDATION := 1
- export SKIP_STACK_VALIDATION
- endif
-endif
-
PHONY += prepare0
+export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
+export MODORDER := $(extmod_prefix)modules.order
+export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
+
ifeq ($(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)))
+build-dir := .
+clean-dirs := $(sort . Documentation \
+ $(patsubst %/,%,$(filter %/, $(core-) \
+ $(drivers-) $(libs-))))
-vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
- $(patsubst %/,%,$(filter %/, $(init-) $(core-) \
- $(drivers-) $(net-) $(libs-) $(virt-))))
+export ARCH_CORE := $(core-y)
+export ARCH_LIB := $(filter %/, $(libs-y))
+export ARCH_DRIVERS := $(drivers-y) $(drivers-m)
+# Externally visible symbols (used by link-vmlinux.sh)
-init-y := $(patsubst %/, %/built-in.a, $(init-y))
-core-y := $(patsubst %/, %/built-in.a, $(core-y))
-drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y))
-net-y := $(patsubst %/, %/built-in.a, $(net-y))
-libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
-libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
-virt-y := $(patsubst %/, %/built-in.a, $(virt-y))
+KBUILD_VMLINUX_OBJS := ./built-in.a
+ifdef CONFIG_MODULES
+KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
+KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
+else
+KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
+endif
-# Externally visible symbols (used by link-vmlinux.sh)
-export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \
- $(drivers-y) $(net-y) $(virt-y)
-export KBUILD_VMLINUX_LIBS := $(libs-y1)
+export KBUILD_VMLINUX_LIBS
export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
-export LDFLAGS_vmlinux
-# used by scripts/package/Makefile
-export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch include scripts tools)
-
-vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
-# Recurse until adjust_autoksyms.sh is satisfied
-PHONY += autoksyms_recursive
-autoksyms_recursive: $(vmlinux-deps)
ifdef CONFIG_TRIM_UNUSED_KSYMS
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
- "$(MAKE) -f $(srctree)/Makefile vmlinux"
-endif
-
# 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
+KBUILD_MODULES := 1
endif
-autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
+# '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14
+quiet_cmd_ar_vmlinux.a = AR $@
+ cmd_ar_vmlinux.a = \
+ rm -f $@; \
+ $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \
+ $(AR) mPiT $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt)
-$(autoksyms_h):
- $(Q)mkdir -p $(dir $@)
- $(Q)touch $@
+targets += vmlinux.a
+vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE
+ $(call if_changed,ar_vmlinux.a)
-ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
+PHONY += vmlinux_o
+vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS)
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o
-# Final link of vmlinux with optional arch pass after final link
-cmd_link-vmlinux = \
- $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \
- $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
-
-vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
- +$(call if_changed,link-vmlinux)
-
-targets := vmlinux
+vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o
+ @:
-# Some samples need headers_install.
-samples: headers_install
+PHONY += vmlinux
+# LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux,
+# not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is
+# unrelated; the decompressors just happen to have the same base name,
+# arch/*/boot/compressed/vmlinux.
+# Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux.
+#
+# _LDFLAGS_vmlinux is a workaround for the 'private export' bug:
+# https://savannah.gnu.org/bugs/?61463
+# For Make > 4.4, the following simple code will work:
+# vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
+vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
+vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux)
+vmlinux: vmlinux.o $(KBUILD_LDS) modpost
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux
# The actual objects are generated when descending,
# make sure no implicit rule kicks in
-$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
+$(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ;
-# 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
- $(Q)$(MAKE) $(build)=$@ need-builtin=1
-
-filechk_kernel.release = \
- echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
+ifeq ($(origin KERNELRELEASE),file)
+filechk_kernel.release = $(srctree)/scripts/setlocalversion $(srctree)
+else
+filechk_kernel.release = echo $(KERNELRELEASE)
+endif
# Store (new) KERNELRELEASE string in include/config/kernel.release
include/config/kernel.release: FORCE
# archprepare is used in arch Makefiles and when processed asm symlink,
# version.h and scripts_basic is processed / created.
-PHONY += prepare archprepare prepare1 prepare3
+PHONY += prepare archprepare
-# 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 ($(srctree),.)
- @$(kecho) ' Using $(srctree) as source for kernel'
- $(Q)if [ -f $(srctree)/.config -o \
- -d $(srctree)/include/config -o \
- -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
- echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
- echo >&2 " in the '$(srctree)' directory.";\
- /bin/false; \
- fi;
-endif
-
-prepare1: prepare3 outputmakefile asm-generic $(version_h) $(autoksyms_h) \
- include/generated/utsrelease.h
- $(cmd_crmodverdir)
-
-archprepare: archheaders archscripts prepare1 scripts
+archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
+ asm-generic $(version_h) include/generated/utsrelease.h \
+ include/generated/compile.h include/generated/autoconf.h remove-stale-files
prepare0: archprepare
$(Q)$(MAKE) $(build)=scripts/mod
- $(Q)$(MAKE) $(build)=.
+ $(Q)$(MAKE) $(build)=. prepare
# All the preparing..
-prepare: prepare0 prepare-objtool
+prepare: prepare0
+ifdef CONFIG_RUST
+ +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh
+ $(Q)$(MAKE) $(build)=rust
+endif
+
+PHONY += remove-stale-files
+remove-stale-files:
+ $(Q)$(srctree)/scripts/remove-stale-files
# Support for using generic headers in asm-generic
asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
generic=include/uapi/asm-generic
-PHONY += prepare-objtool
-prepare-objtool: $(objtool_target)
-ifeq ($(SKIP_STACK_VALIDATION),1)
-ifdef CONFIG_UNWINDER_ORC
- @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
- @false
-else
- @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
-endif
-endif
-
# Generate some files
# ---------------------------------------------------------------------------
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))'
+ if [ $(SUBLEVEL) -gt 255 ]; then \
+ echo \#define LINUX_VERSION_CODE $(shell \
+ expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
+ else \
+ echo \#define LINUX_VERSION_CODE $(shell \
+ expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
+ fi; \
+ echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \
+ ((c) > 255 ? 255 : (c)))'; \
+ echo \#define LINUX_VERSION_MAJOR $(VERSION); \
+ echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \
+ echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
endef
+$(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0)
+$(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0)
$(version_h): FORCE
$(call filechk,version.h)
- $(Q)rm -f $(old_version_h)
include/generated/utsrelease.h: include/config/kernel.release FORCE
$(call filechk,utsrelease.h)
+filechk_compile.h = $(srctree)/scripts/mkcompile_h \
+ "$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)"
+
+include/generated/compile.h: FORCE
+ $(call filechk,compile.h)
+
PHONY += headerdep
headerdep:
$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
#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)
+quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
+ cmd_headers_install = \
+ mkdir -p $(INSTALL_HDR_PATH); \
+ rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
+ usr/include $(INSTALL_HDR_PATH)
+
+PHONY += headers_install
+headers_install: headers
+ $(call cmd,headers_install)
PHONY += archheaders archscripts
-PHONY += __headers
-__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
- $(Q)$(MAKE) $(build)=scripts build_unifdef
+hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
-PHONY += headers_install_all
-headers_install_all:
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
+PHONY += headers
+headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
+ $(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML))
+ $(Q)$(MAKE) $(hdr-inst)=include/uapi
+ $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
-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)
+ifdef CONFIG_HEADERS_INSTALL
+prepare: headers
+endif
+
+PHONY += scripts_unifdef
+scripts_unifdef: scripts_basic
+ $(Q)$(MAKE) $(build)=scripts scripts/unifdef
+
+# ---------------------------------------------------------------------------
+# Install
+
+# Many distributions have the custom install script, /sbin/installkernel.
+# If DKMS is installed, 'make install' will eventually recurse back
+# to this Makefile to build and install external modules.
+# Cancel sub_make_done so that options such as M=, V=, etc. are parsed.
+
+quiet_cmd_install = INSTALL $(INSTALL_PATH)
+ cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh
+
+# ---------------------------------------------------------------------------
+# vDSO install
+
+PHONY += vdso_install
+vdso_install: export INSTALL_FILES = $(vdso-install-y)
+vdso_install:
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vdsoinst
+
+# ---------------------------------------------------------------------------
+# Tools
+
+ifdef CONFIG_OBJTOOL
+prepare: tools/objtool
+endif
+
+ifdef CONFIG_BPF
+ifdef CONFIG_DEBUG_INFO_BTF
+prepare: tools/bpf/resolve_btfids
+endif
+endif
-PHONY += headers_check_all
-headers_check_all: headers_install_all
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
+PHONY += resolve_btfids_clean
-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
+resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
+
+# tools/bpf/resolve_btfids directory might not exist
+# in output directory, skip its clean in that case
+resolve_btfids_clean:
+ifneq ($(wildcard $(resolve_btfids_O)),)
+ $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
+endif
-ifdef CONFIG_HEADERS_CHECK
-all: headers_check
+# Clear a bunch of variables before executing the submake
+ifeq ($(quiet),silent_)
+tools_silent=s
endif
+tools/: FORCE
+ $(Q)mkdir -p $(objtree)/tools
+ $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
+
+tools/%: FORCE
+ $(Q)mkdir -p $(objtree)/tools
+ $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
+
# ---------------------------------------------------------------------------
# Kernel selftest
PHONY += kselftest
-kselftest:
+kselftest: headers
$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
-PHONY += kselftest-clean
-kselftest-clean:
- $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean
+kselftest-%: headers FORCE
+ $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
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
+ $(Q)find $(srctree)/tools/testing/selftests -name config -o -name config.$(UTS_MACHINE) | \
+ xargs $(srctree)/scripts/kconfig/merge_config.sh -y -m $(objtree)/.config
+ $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
# ---------------------------------------------------------------------------
# Devicetree files
ifneq ($(dtstree),)
-%.dtb: prepare3 scripts_dtc
+%.dtb: dtbs_prepare
$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
-PHONY += dtbs dtbs_install dt_binding_check
-dtbs dtbs_check: prepare3 scripts_dtc
- $(Q)$(MAKE) $(build)=$(dtstree)
+%.dtbo: dtbs_prepare
+ $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
-dtbs_check: export CHECK_DTBS=1
-dtbs_check: dt_binding_check
+PHONY += dtbs dtbs_prepare dtbs_install dtbs_check
+dtbs: dtbs_prepare
+ $(Q)$(MAKE) $(build)=$(dtstree) need-dtbslist=1
+
+# include/config/kernel.release is actually needed when installing DTBs because
+# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make
+# dtbs_install depend on it as dtbs_install may run as root.
+dtbs_prepare: include/config/kernel.release scripts_dtc
+
+ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
+export CHECK_DTBS=y
+endif
+
+ifneq ($(CHECK_DTBS),)
+dtbs_prepare: dt_binding_check
+endif
+
+dtbs_check: dtbs
dtbs_install:
- $(Q)$(MAKE) $(dtbinst)=$(dtstree)
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.dtbinst obj=$(dtstree)
ifdef CONFIG_OF_EARLY_FLATTREE
all: dtbs
scripts_dtc: scripts_basic
$(Q)$(MAKE) $(build)=scripts/dtc
+ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
+export CHECK_DT_BINDING=y
+endif
+
+PHONY += dt_binding_check
dt_binding_check: scripts_dtc
$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
+PHONY += dt_compatible_check
+dt_compatible_check: dt_binding_check
+ $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@
+
# ---------------------------------------------------------------------------
# Modules
all: modules
+# 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.
+ifdef CONFIG_MODVERSIONS
+ KBUILD_BUILTIN := 1
+endif
+
# 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 include/config/tristate.conf
- $(Q)$(MAKE) $(modbuiltin)=$*
+# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES
+# is an exception.
+ifdef CONFIG_DEBUG_INFO_BTF_MODULES
+KBUILD_BUILTIN := 1
+modules: vmlinux
+endif
+modules: modules_prepare
# Target to prepare building external modules
-PHONY += modules_prepare
modules_prepare: prepare
-
-# 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)/
- @cp -f $(objtree)/modules.builtin.modinfo $(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
+ $(Q)$(MAKE) $(build)=scripts scripts/module.lds
endif # CONFIG_MODULES
# make distclean Remove editor backup files, patch leftover files and the like
# Directories & files removed with 'make clean'
-CLEAN_DIRS += $(MODVERDIR) include/ksym
-CLEAN_FILES += modules.builtin.modinfo
+CLEAN_FILES += vmlinux.symvers modules-only.symvers \
+ modules.builtin modules.builtin.modinfo modules.nsdeps \
+ compile_commands.json .thinlto-cache rust/test \
+ rust-project.json .vmlinux.objs .vmlinux.export.c
# Directories & files removed with 'make mrproper'
-MRPROPER_DIRS += include/config usr/include include/generated \
- arch/$(SRCARCH)/include/generated .tmp_objdiff
-MRPROPER_FILES += .config .config.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
+MRPROPER_FILES += include/config include/generated \
+ arch/$(SRCARCH)/include/generated .objdiff \
+ debian snap tar-install \
+ .config .config.old .version \
+ Module.symvers \
+ certs/signing_key.pem \
+ certs/x509.genkey \
+ vmlinux-gdb.py \
+ rpmbuild \
+ rust/libmacros.so
# 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))
-PHONY += $(clean-dirs) clean archclean vmlinuxclean
-$(clean-dirs):
- $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
+PHONY += archclean vmlinuxclean
vmlinuxclean:
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
-clean: archclean vmlinuxclean
+clean: archclean vmlinuxclean resolve_btfids_clean
# mrproper - Delete all generated files, including .config
#
-mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
mrproper-dirs := $(addprefix _mrproper_,scripts)
$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
mrproper: clean $(mrproper-dirs)
- $(call cmd,rmdirs)
$(call cmd,rmfiles)
+ @find . $(RCS_FIND_IGNORE) \
+ \( -name '*.rmeta' \) \
+ -type f -print | xargs rm -f
# distclean
#
PHONY += distclean
distclean: mrproper
- @find $(srctree) $(RCS_FIND_IGNORE) \
+ @find . $(RCS_FIND_IGNORE) \
\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
-o -name '*.bak' -o -name '#*#' -o -name '*%' \
- -o -name 'core' \) \
+ -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
+ -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
-type f -print | xargs rm -f
# Packaging of the kernel to various formats
# ---------------------------------------------------------------------------
-package-dir := scripts/package
%src-pkg: FORCE
- $(Q)$(MAKE) $(build)=$(package-dir) $@
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
%pkg: include/config/kernel.release FORCE
- $(Q)$(MAKE) $(build)=$(package-dir) $@
-
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
# Brief documentation of the typical targets used
# ---------------------------------------------------------------------------
@echo ' mrproper - Remove all generated files + config + various backup files'
@echo ' distclean - mrproper + remove editor backup and patch files'
@echo ''
- @echo 'Configuration targets:'
@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
@echo ''
@echo 'Other generic targets:'
@echo '* vmlinux - Build the bare kernel'
@echo '* modules - Build all modules'
@echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
+ @echo ' vdso_install - Install unstripped vdso to INSTALL_MOD_PATH (default: /)'
@echo ' dir/ - Build all files in dir and below'
@echo ' dir/file.[ois] - Build specified target only'
@echo ' dir/file.ll - Build the LLVM assembly file'
echo ' (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 ' checkstack - Generate a list of stack hogs and consider all functions'
+ @echo ' with a stack size larger than MINSTACKSIZE (default: 100)'
@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'
@echo ' coccicheck - Check with Coccinelle'
+ @echo ' clang-analyzer - Check with clang static analyzer'
+ @echo ' clang-tidy - Check with clang-tidy'
+ @echo ''
+ @echo 'Tools:'
+ @echo ' nsdeps - Generate missing symbol namespace dependencies'
@echo ''
@echo 'Kernel selftest:'
- @echo ' kselftest - Build and run kernel selftest (run as root)'
- @echo ' Build, install, and boot kernel before'
- @echo ' running kselftest on it'
- @echo ' kselftest-clean - Remove all generated kselftest files'
- @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing'
- @echo ' .config.'
+ @echo ' kselftest - Build and run kernel selftest'
+ @echo ' Build, install, and boot kernel before'
+ @echo ' running kselftest on it'
+ @echo ' Run as root for full coverage'
+ @echo ' kselftest-all - Build kernel selftest'
+ @echo ' kselftest-install - Build and install kernel selftest'
+ @echo ' kselftest-clean - Remove all generated kselftest files'
+ @echo ' kselftest-merge - Merge all the config dependencies of'
+ @echo ' kselftest to existing .config.'
+ @echo ''
+ @echo 'Rust targets:'
+ @echo ' rustavailable - Checks whether the Rust toolchain is'
+ @echo ' available and, if not, explains why.'
+ @echo ' rustfmt - Reformat all the Rust code in the kernel'
+ @echo ' rustfmtcheck - Checks if all the Rust code in the kernel'
+ @echo ' is formatted, printing a diff otherwise.'
+ @echo ' rustdoc - Generate Rust documentation'
+ @echo ' (requires kernel .config)'
+ @echo ' rusttest - Runs the Rust tests'
+ @echo ' (requires kernel .config; downloads external repos)'
+ @echo ' rust-analyzer - Generate rust-project.json rust-analyzer support file'
+ @echo ' (requires kernel .config)'
+ @echo ' dir/file.[os] - Build specified target only'
+ @echo ' dir/file.rsi - Build macro expanded source, similar to C preprocessing.'
+ @echo ' Run with RUSTFMT=n to skip reformatting if needed.'
+ @echo ' The output is not intended to be compilable.'
+ @echo ' dir/file.ll - Build the LLVM assembly file'
@echo ''
@$(if $(dtstree), \
echo 'Devicetree:'; \
- echo '* dtbs - Build device tree blobs for enabled boards'; \
- echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
+ echo '* dtbs - Build device tree blobs for enabled boards'; \
+ echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
+ echo ' dt_binding_check - Validate device tree binding documents'; \
+ echo ' dtbs_check - Validate device tree source files';\
echo '')
@echo 'Userspace tools targets:'
@echo ' or "cd tools; make help"'
@echo ''
@echo 'Kernel packaging:'
- @$(MAKE) $(build)=$(package-dir) help
+ @$(MAKE) -f $(srctree)/scripts/Makefile.package help
@echo ''
@echo 'Documentation targets:'
@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
@echo ''
- @echo 'Architecture specific targets ($(SRCARCH)):'
- @$(if $(archhelp),$(archhelp),\
- echo ' No architecture specific help defined for $(SRCARCH)')
+ @echo 'Architecture-specific targets ($(SRCARCH)):'
+ @$(or $(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));) \
+ printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
echo '')
@$(if $(board-dirs), \
$(foreach b, $(board-dirs), \
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 V=n [targets] 1: verbose build'
+ @echo ' 2: give reason for rebuild of target'
+ @echo ' V=1 and V=2 can be combined with V=12'
@echo ' make O=dir [targets] Locate all output files in "dir", including .config'
- @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
+ @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK'
+ @echo ' (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 ' make W=n [targets] Enable extra build checks, n=1,2,3,c,e 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 ' c: extra checks in the configuration stage (Kconfig)'
+ @echo ' e: warnings are being treated as errors'
@echo ' Multiple levels can be combined with W=12 or W=123'
+ @$(if $(dtstree), \
+ echo ' make CHECK_DTBS=1 [targets] Check all generated dtb files against schema'; \
+ echo ' This can be applied both to "dtbs" and to individual "foo.dtb" targets' ; \
+ )
@echo ''
@echo 'Execute "make" or "make all" to build all targets marked with [*] '
@echo 'For further info see the ./README file'
boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
$(help-board-dirs): help-%:
- @echo 'Architecture specific targets ($(SRCARCH) $*):'
+ @echo 'Architecture-specific targets ($(SRCARCH) $*):'
@$(if $(boards-per-dir), \
$(foreach b, $(boards-per-dir), \
printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
# Documentation targets
# ---------------------------------------------------------------------------
DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
- linkcheckdocs dochelp refcheckdocs
+ linkcheckdocs dochelp refcheckdocs texinfodocs infodocs
PHONY += $(DOC_TARGETS)
-$(DOC_TARGETS): scripts_basic FORCE
+$(DOC_TARGETS):
$(Q)$(MAKE) $(build)=Documentation $@
+
+# Rust targets
+# ---------------------------------------------------------------------------
+
+# "Is Rust available?" target
+PHONY += rustavailable
+rustavailable:
+ +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh && echo "Rust is available!"
+
+# Documentation target
+#
+# Using the singular to avoid running afoul of `no-dot-config-targets`.
+PHONY += rustdoc
+rustdoc: prepare
+ $(Q)$(MAKE) $(build)=rust $@
+
+# Testing target
+PHONY += rusttest
+rusttest: prepare
+ $(Q)$(MAKE) $(build)=rust $@
+
+# Formatting targets
+PHONY += rustfmt rustfmtcheck
+
+# We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream.
+#
+# We match using absolute paths since `find` does not resolve them
+# when matching, which is a problem when e.g. `srctree` is `..`.
+# We `grep` afterwards in order to remove the directory entry itself.
+rustfmt:
+ $(Q)find $(abs_srctree) -type f -name '*.rs' \
+ -o -path $(abs_srctree)/rust/alloc -prune \
+ -o -path $(abs_objtree)/rust/test -prune \
+ | grep -Fv $(abs_srctree)/rust/alloc \
+ | grep -Fv $(abs_objtree)/rust/test \
+ | grep -Fv generated \
+ | xargs $(RUSTFMT) $(rustfmt_flags)
+
+rustfmtcheck: rustfmt_flags = --check
+rustfmtcheck: rustfmt
+
# Misc
# ---------------------------------------------------------------------------
+PHONY += misc-check
+misc-check:
+ $(Q)$(srctree)/scripts/misc-check
+
+all: misc-check
+
PHONY += scripts_gdb
-scripts_gdb: prepare
+scripts_gdb: prepare0
$(Q)$(MAKE) $(build)=scripts/gdb
$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
else # KBUILD_EXTMOD
+filechk_kernel.release = echo $(KERNELRELEASE)
+
###
# 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 += $(objtree)/Module.symvers
-$(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): prepare $(objtree)/Module.symvers
- $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
-
-modules: $(module-dirs)
- @$(kecho) ' Building modules, stage 2.';
- $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
+# in the basis kernel ordinary make commands (without M=...) must be used.
-PHONY += modules_install
-modules_install: _emodinst_ _emodinst_post
+# We are always building only modules.
+KBUILD_BUILTIN :=
+KBUILD_MODULES := 1
-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
+build-dir := $(KBUILD_EXTMOD)
-PHONY += _emodinst_post
-_emodinst_post: _emodinst_
- $(call cmd,depmod)
+compile_commands.json: $(extmod_prefix)compile_commands.json
+PHONY += compile_commands.json
-clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
+clean-dirs := $(KBUILD_EXTMOD)
+clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
+ $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
-PHONY += $(clean-dirs) clean
-$(clean-dirs):
- $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
-
-clean: rm-dirs := $(MODVERDIR)
-clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
+PHONY += prepare
+# now expand this into a simple variable to reduce the cost of shell evaluations
+prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT)
+prepare:
+ @if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \
+ echo >&2 "warning: the compiler differs from the one used to build the kernel"; \
+ echo >&2 " The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \
+ echo >&2 " You are using: $(CC_VERSION_TEXT)"; \
+ fi
PHONY += help
help:
@echo ' modules - default target, build the module(s)'
@echo ' modules_install - install the module'
@echo ' clean - remove generated files in module directory only'
+ @echo ' rust-analyzer - generate rust-project.json rust-analyzer support file'
@echo ''
-PHONY += prepare
-prepare:
- $(cmd_crmodverdir)
+ifndef CONFIG_MODULES
+modules modules_install: __external_modules_error
+__external_modules_error:
+ @echo >&2 '***'
+ @echo >&2 '*** The present kernel disabled CONFIG_MODULES.'
+ @echo >&2 '*** You cannot build or install external modules.'
+ @echo >&2 '***'
+ @false
+endif
+
endif # KBUILD_EXTMOD
+# ---------------------------------------------------------------------------
+# Modules
+
+PHONY += modules modules_install modules_sign modules_prepare
+
+modules_install:
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst \
+ sign-only=$(if $(filter modules_install,$(MAKECMDGOALS)),,y)
+
+ifeq ($(CONFIG_MODULE_SIG),y)
+# modules_sign is a subset of modules_install.
+# 'make modules_install modules_sign' is equivalent to 'make modules_install'.
+modules_sign: modules_install
+ @:
+else
+modules_sign:
+ @echo >&2 '***'
+ @echo >&2 '*** CONFIG_MODULE_SIG is disabled. You cannot sign modules.'
+ @echo >&2 '***'
+ @false
+endif
+
+ifdef CONFIG_MODULES
+
+$(MODORDER): $(build-dir)
+ @:
+
+# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules.
+# This is solely useful to speed up test compiles.
+modules: modpost
+ifneq ($(KBUILD_MODPOST_NOFINAL),1)
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
+endif
+
+PHONY += modules_check
+modules_check: $(MODORDER)
+ $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
+
+else # CONFIG_MODULES
+
+modules:
+ @:
+
+KBUILD_MODULES :=
+
+endif # CONFIG_MODULES
+
+PHONY += modpost
+modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \
+ $(if $(KBUILD_MODULES), modules_check)
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
+
+# Single targets
+# ---------------------------------------------------------------------------
+# To build individual files in subdirectories, you can do like this:
+#
+# make foo/bar/baz.s
+#
+# The supported suffixes for single-target are listed in 'single-targets'
+#
+# To build only under specific subdirectories, you can do like this:
+#
+# make foo/bar/baz/
+
+ifdef single-build
+
+# .ko is special because modpost is needed
+single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
+single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \
+ $(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko)))
+
+$(single-ko): single_modules
+ @:
+$(single-no-ko): $(build-dir)
+ @:
+
+# Remove MODORDER when done because it is not the real one.
+PHONY += single_modules
+single_modules: $(single-no-ko) modules_prepare
+ $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$(m:%.ko=%.o);) } > $(MODORDER)
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
+ifneq ($(KBUILD_MODPOST_NOFINAL),1)
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
+endif
+ $(Q)rm -f $(MODORDER)
+
+single-goals := $(addprefix $(build-dir)/, $(single-no-ko))
+
+KBUILD_MODULES := 1
+
+endif
+
+# 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 += $(build-dir)
+$(build-dir): prepare
+ $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals)
+
+clean-dirs := $(addprefix _clean_, $(clean-dirs))
+PHONY += $(clean-dirs) clean
+$(clean-dirs):
+ $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
+
clean: $(clean-dirs)
- $(call cmd,rmdirs)
$(call cmd,rmfiles)
- @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
- \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
+ @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
+ \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \
-o -name '*.ko.*' \
- -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
+ -o -name '*.dtb' -o -name '*.dtbo' \
+ -o -name '*.dtb.S' -o -name '*.dtbo.S' \
+ -o -name '*.dt.yaml' -o -name 'dtbs-list' \
-o -name '*.dwo' -o -name '*.lst' \
- -o -name '*.su' \
+ -o -name '*.su' -o -name '*.mod' \
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
-o -name '*.lex.c' -o -name '*.tab.[ch]' \
-o -name '*.asn1.[ch]' \
-o -name '*.symtypes' -o -name 'modules.order' \
- -o -name modules.builtin -o -name '.tmp_*.o.*' \
-o -name '*.c.[012]*.*' \
-o -name '*.ll' \
- -o -name '*.gcno' \) -type f -print | xargs rm -f
+ -o -name '*.gcno' \
+ -o -name '*.*.symversions' \) -type f -print \
+ -o -name '.tmp_*' -print \
+ | xargs rm -rf
# Generate tags for editors
# ---------------------------------------------------------------------------
quiet_cmd_tags = GEN $@
- cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
+ cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
tags TAGS cscope gtags: FORCE
$(call cmd,tags)
+# IDE support targets
+PHONY += rust-analyzer
+rust-analyzer:
+ $(Q)$(MAKE) $(build)=rust $@
+
+# Script to generate missing namespace dependencies
+# ---------------------------------------------------------------------------
+
+PHONY += nsdeps
+nsdeps: export KBUILD_NSDEPS=1
+nsdeps: modules
+ $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
+
+# Clang Tooling
+# ---------------------------------------------------------------------------
+
+quiet_cmd_gen_compile_commands = GEN $@
+ cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
+
+$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
+ $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \
+ $(if $(CONFIG_MODULES), $(MODORDER)) FORCE
+ $(call if_changed,gen_compile_commands)
+
+targets += $(extmod_prefix)compile_commands.json
+
+PHONY += clang-tidy clang-analyzer
+
+ifdef CONFIG_CC_IS_CLANG
+quiet_cmd_clang_tools = CHECK $<
+ cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
+
+clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
+ $(call cmd,clang_tools)
+else
+clang-tidy clang-analyzer:
+ @echo "$@ requires CC=clang" >&2
+ @false
+endif
+
# Scripts to check various things for consistency
# ---------------------------------------------------------------------------
-PHONY += includecheck versioncheck coccicheck namespacecheck export_report
+PHONY += includecheck versioncheck coccicheck export_report
includecheck:
find $(srctree)/* $(RCS_FIND_IGNORE) \
| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
coccicheck:
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
-
-namespacecheck:
- $(PERL) $(srctree)/scripts/namespace.pl
+ $(Q)$(BASH) $(srctree)/scripts/$@
export_report:
$(PERL) $(srctree)/scripts/export_report.pl
else
CHECKSTACK_ARCH := $(ARCH)
endif
+MINSTACKSIZE ?= 100
checkstack:
$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
- $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
+ $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) $(MINSTACKSIZE)
kernelrelease:
- @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
+ @$(filechk_kernel.release)
kernelversion:
@echo $(KERNELVERSION)
image_name:
@echo $(KBUILD_IMAGE)
-# Clear a bunch of variables before executing the submake
-
-ifeq ($(quiet),silent_)
-tools_silent=s
-endif
-
-tools/: FORCE
- $(Q)mkdir -p $(objtree)/tools
- $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/
-
-tools/%: FORCE
- $(Q)mkdir -p $(objtree)/tools
- $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $*
-
-# Single targets
-# ---------------------------------------------------------------------------
-# Single targets are compatible with:
-# - build with mixed source and output
-# - build with separate output dir 'make O=...'
-# - external modules
-#
-# target-dir => where to store outputfile
-# build-dir => directory in kernel source tree to use
-
-build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@
-build-dir = $(patsubst %/,%,$(dir $(build-target)))
-
-%.i: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.ll: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.lst: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.o: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.s: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.symtypes: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.ko: %.o
- $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
-
-# Modules
-PHONY += /
-/: ./
-
-# Make sure the latest headers are built for Documentation
-Documentation/ samples/: headers_install
-%/: prepare FORCE
- $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir)
-
-# 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)
+PHONY += run-command
+run-command:
+ $(Q)$(KBUILD_RUN_COMMAND)
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)
-
-# 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)/*)
+ cmd_rmfiles = rm -rf $(rm-files)
# read saved command lines for existing targets
existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
-endif # ifeq ($(config-targets),1)
-endif # ifeq ($(mixed-targets),1)
-endif # need-sub-make
+endif # config-build
+endif # mixed-build
+endif # need-sub-make
PHONY += FORCE
FORCE:
git.samba.org / sfrench / cifs-2.6.git / blobdiff