| # SPDX-License-Identifier: GPL-2.0 |
| VERSION = 6 |
| PATCHLEVEL = 0 |
| SUBLEVEL = 0 |
| EXTRAVERSION = |
| NAME = Hurr durr I'ma ninja sloth |
| |
| # *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. |
| |
| $(if $(filter __%, $(MAKECMDGOALS)), \ |
| $(error targets prefixed with '__' are only for internal use)) |
| |
| # That's our default target when none is given on the command line |
| PHONY := __all |
| __all: |
| |
| # We are using a recursive build, so we need to do a little thinking |
| # to get the ordering right. |
| # |
| # Most importantly: sub-Makefiles should only ever modify files in |
| # their own directory. If in some directory we have a dependency on |
| # a file in another dir (which doesn't happen often, but it's often |
| # unavoidable when linking the built-in.a targets which finally |
| # turn into vmlinux), we will call a sub make in that other dir, and |
| # after that we are sure that everything which is in that other dir |
| # is now up to date. |
| # |
| # The only cases where we need to modify files which have global |
| # effects are thus separated out and done before the recursive |
| # descending is started. They are now explicitly listed as the |
| # prepare rule. |
| |
| ifneq ($(sub_make_done),1) |
| |
| # Do not use make's built-in rules and variables |
| # (this increases performance and avoids hard-to-debug behaviour) |
| MAKEFLAGS += -rR |
| |
| # 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 |
| |
| # 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 $@ :< |
| # |
| # If KBUILD_VERBOSE equals 0 then the above command will be hidden. |
| # If KBUILD_VERBOSE equals 1 then the above command is displayed. |
| # If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. |
| # |
| # To put more focus on warnings, be less verbose as default |
| # Use 'make V=1' to see the full commands |
| |
| ifeq ("$(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 ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
| quiet=silent_ |
| KBUILD_VERBOSE = 0 |
| endif |
| |
| export quiet Q KBUILD_VERBOSE |
| |
| # Call a source code checker (by default, "sparse") as part of the |
| # C compilation. |
| # |
| # Use 'make C=1' to enable checking of only re-compiled files. |
| # Use 'make C=2' to enable checking of *all* source files, regardless |
| # of whether they are re-compiled or not. |
| # |
| # See the file "Documentation/dev-tools/sparse.rst" for more details, |
| # including where to get the "sparse" utility. |
| |
| ifeq ("$(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 $(KBUILD_EXTMOD).) |
| endif |
| |
| export KBUILD_EXTMOD |
| |
| # Kbuild will save output files in the current working directory. |
| # This does not need to match to the root of the kernel source tree. |
| # |
| # For example, you can do this: |
| # |
| # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile |
| # |
| # If you want to save output files in a different location, there are |
| # two syntaxes to specify it. |
| # |
| # 1) O= |
| # Use "make O=dir/to/store/output/files/" |
| # |
| # 2) Set KBUILD_OUTPUT |
| # Set the environment variable KBUILD_OUTPUT to point to the output directory. |
| # export KBUILD_OUTPUT=dir/to/store/output/files/; make |
| # |
| # The O= assignment takes precedence over the KBUILD_OUTPUT environment |
| # variable. |
| |
| # Do we want to change the working directory? |
| ifeq ("$(origin O)", "command line") |
| KBUILD_OUTPUT := $(O) |
| endif |
| |
| ifneq ($(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 ...) resolves symlinks |
| abs_objtree := $(realpath $(abs_objtree)) |
| else |
| abs_objtree := $(CURDIR) |
| endif # ifneq ($(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 |
| |
| this-makefile := $(lastword $(MAKEFILE_LIST)) |
| abs_srctree := $(realpath $(dir $(this-makefile))) |
| |
| ifneq ($(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 |
| # |
| # --included-dir is added for backward compatibility, but you should not rely on |
| # it. Please add $(srctree)/ prefix to include Makefiles in the source tree. |
| MAKEFLAGS += --include-dir=$(abs_srctree) |
| 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. |
| $(this-makefile): ; |
| endif |
| |
| export abs_srctree abs_objtree |
| export sub_make_done := 1 |
| |
| ifeq ($(need-sub-make),1) |
| |
| PHONY += $(MAKECMDGOALS) __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 $(MAKECMDGOALS) |
| |
| endif # need-sub-make |
| endif # sub_make_done |
| |
| # We process the rest of the Makefile if this is the final invocation of make |
| ifeq ($(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 |
| |
| 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 |
| srctree := .. |
| else |
| srctree := $(abs_srctree) |
| endif |
| building_out_of_srctree := 1 |
| endif |
| |
| ifneq ($(KBUILD_ABS_SRCTREE),) |
| srctree := $(abs_srctree) |
| endif |
| |
| objtree := . |
| VPATH := $(srctree) |
| |
| 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 |
| # 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 |
| |
| clean-targets := %clean mrproper cleandocs |
| no-dot-config-targets := $(clean-targets) \ |
| cscope gtags TAGS tags help% %docs check% coccicheck \ |
| $(version_h) headers headers_% archheaders archscripts \ |
| %asm-generic kernelversion %src-pkg dt_binding_check \ |
| outputmakefile rustavailable rustfmt rustfmtcheck |
| # Installation targets should not require compiler. Unfortunately, vdso_install |
| # is an exception where build artifacts may be updated. This must be fixed. |
| no-compiler-targets := $(no-dot-config-targets) install dtbs_install \ |
| headers_install modules_install kernelrelease image_name |
| no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \ |
| image_name |
| single-targets := %.a %.i %.rsi %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ |
| |
| config-build := |
| mixed-build := |
| need-config := 1 |
| need-compiler := 1 |
| may-sync-config := 1 |
| single-build := |
| |
| ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| need-config := |
| endif |
| endif |
| |
| ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) |
| ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) |
| need-compiler := |
| endif |
| endif |
| |
| ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
| ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) |
| may-sync-config := |
| endif |
| endif |
| |
| ifneq ($(KBUILD_EXTMOD),) |
| may-sync-config := |
| endif |
| |
| ifeq ($(KBUILD_EXTMOD),) |
| ifneq ($(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-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-build := 1 |
| endif |
| endif |
| |
| ifdef mixed-build |
| # =========================================================================== |
| # We're called with mixed targets (*config and build targets). |
| # Handle them one by one. |
| |
| PHONY += $(MAKECMDGOALS) __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 # !mixed-build |
| |
| 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) |
| KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) |
| export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION |
| |
| 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 |
| # 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. |
| # Default value for CROSS_COMPILE is not to prefix executables |
| # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile |
| ARCH ?= $(SUBARCH) |
| |
| # 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 ($(ARCH),sparc64) |
| SRCARCH := sparc |
| endif |
| |
| # Additional ARCH settings for parisc |
| ifeq ($(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 := sh |
| |
| HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
| HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) |
| HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) |
| |
| ifneq ($(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 \ |
| -Wdeclaration-after-statement |
| 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 \ |
| -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...) |
| 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 |
| 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 = depmod |
| PERL = perl |
| PYTHON3 = python3 |
| CHECK = sparse |
| BASH = bash |
| KGZIP = gzip |
| KBZIP2 = bzip2 |
| KLZOP = lzop |
| LZMA = lzma |
| LZ4 = lz4c |
| XZ = xz |
| ZSTD = zstd |
| |
| PAHOLE_FLAGS = $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh) |
| |
| CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
| -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
| NOSTDINC_FLAGS := |
| CFLAGS_MODULE = |
| RUSTFLAGS_MODULE = |
| AFLAGS_MODULE = |
| LDFLAGS_MODULE = |
| CFLAGS_KERNEL = |
| RUSTFLAGS_KERNEL = |
| AFLAGS_KERNEL = |
| export LDFLAGS_vmlinux = |
| |
| # Use USERINCLUDE when you must reference the UAPI directories only. |
| USERINCLUDE := \ |
| -I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
| -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ |
| -I$(srctree)/include/uapi \ |
| -I$(objtree)/include/generated/uapi \ |
| -include $(srctree)/include/linux/compiler-version.h \ |
| -include $(srctree)/include/linux/kconfig.h |
| |
| # Use LINUXINCLUDE when you must reference the include/ directory. |
| # Needed to be compatible with the O= option |
| LINUXINCLUDE := \ |
| -I$(srctree)/arch/$(SRCARCH)/include \ |
| -I$(objtree)/arch/$(SRCARCH)/include/generated \ |
| $(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 \ |
| -Werror=return-type -Wno-format-security \ |
| -std=gnu11 |
| KBUILD_CPPFLAGS := -D__KERNEL__ |
| KBUILD_RUSTFLAGS := $(rust_common_flags) \ |
| --target=$(objtree)/rust/target.json \ |
| -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_RUSTFLAGS_MODULE := --cfg MODULE |
| KBUILD_LDFLAGS_MODULE := |
| KBUILD_LDFLAGS := |
| CLANG_FLAGS := |
| |
| 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 KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE |
| export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
| export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
| export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL |
| export PAHOLE_FLAGS |
| |
| # Files to ignore in find ... statements |
| |
| export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
| -name CVS -o -name .pc -o -name .hg -o -name .git \) \ |
| -prune -o |
| export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
| --exclude CVS --exclude .pc --exclude .hg --exclude .git |
| |
| # =========================================================================== |
| # Rules shared between *config targets and build targets |
| |
| # Basic helpers built in scripts/basic/ |
| PHONY += scripts_basic |
| scripts_basic: |
| $(Q)$(MAKE) $(build)=scripts/basic |
| |
| 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: |
| @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 |
| $(call cmd,makefile) |
| $(Q)test -e .gitignore || \ |
| { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore |
| endif |
| |
| # The expansion should be delayed until arch/$(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 = $(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 |
| |
| # 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. |
| # KBUILD_DEFCONFIG may point out an alternative default configuration |
| # used for 'make defconfig' |
| include $(srctree)/arch/$(SRCARCH)/Makefile |
| export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
| |
| config: outputmakefile scripts_basic FORCE |
| $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| |
| %config: outputmakefile scripts_basic FORCE |
| $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| |
| else #!config-build |
| # =========================================================================== |
| # Build targets only - this includes vmlinux, arch specific targets, clean |
| # targets and others. In general all targets except *config targets. |
| |
| # If building an external module we do not care about the all: rule |
| # but instead __all depend on modules |
| PHONY += all |
| ifeq ($(KBUILD_EXTMOD),) |
| __all: all |
| else |
| __all: modules |
| endif |
| |
| targets := |
| |
| # 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. |
| ifeq ($(MAKECMDGOALS),modules) |
| KBUILD_BUILTIN := |
| endif |
| |
| # If we have "make <whatever> modules", compile modules |
| # in addition to whatever we do anyway. |
| # Just "make" or "make all" shall build modules as well |
| |
| ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) |
| KBUILD_MODULES := 1 |
| endif |
| |
| ifeq ($(MAKECMDGOALS),) |
| KBUILD_MODULES := 1 |
| endif |
| |
| export KBUILD_MODULES KBUILD_BUILTIN |
| |
| ifdef need-config |
| include include/config/auto.conf |
| endif |
| |
| ifeq ($(KBUILD_EXTMOD),) |
| # Objects we will link into vmlinux / subdirs we need to visit |
| core-y := |
| drivers-y := |
| libs-y := lib/ |
| endif # KBUILD_EXTMOD |
| |
| # 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 |
| |
| 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. |
| ifdef CONFIG_FUNCTION_TRACER |
| CC_FLAGS_FTRACE := -pg |
| endif |
| |
| 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 |
| |
| $(KCONFIG_CONFIG): |
| @echo >&2 '***' |
| @echo >&2 '*** Configuration file "$@" not found!' |
| @echo >&2 '***' |
| @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' |
| @echo >&2 '*** "make menuconfig" or "make xconfig").' |
| @echo >&2 '***' |
| @/bin/false |
| |
| # The actual configuration files used during the build are stored in |
| # include/generated/ and include/config/. Update them if .config is newer than |
| # include/config/auto.conf (which mirrors .config). |
| # |
| # This exploits the 'multi-target pattern rule' trick. |
| # The syncconfig should be executed only once to make all the targets. |
| # (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 # !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: |
| @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 # may-sync-config |
| endif # need-config |
| |
| KBUILD_CFLAGS += -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 += $(call cc-disable-warning, address-of-packed-member) |
| |
| ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE |
| KBUILD_CFLAGS += -O2 |
| KBUILD_RUSTFLAGS += -Copt-level=2 |
| else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
| KBUILD_CFLAGS += -Os |
| KBUILD_RUSTFLAGS += -Copt-level=s |
| endif |
| |
| # Always set `debug-assertions` and `overflow-checks` because their default |
| # depends on `opt-level` and `debug-assertions`, respectively. |
| KBUILD_RUSTFLAGS += -Cdebug-assertions=$(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) |
| KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) |
| endif |
| |
| ifdef CONFIG_READABLE_ASM |
| # Disable optimizations that make assembler listings hard to read. |
| # reorder blocks reorders the control in the function |
| # ipa clone creates specialized cloned functions |
| # partial inlining inlines only parts of functions |
| KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining |
| endif |
| |
| ifneq ($(CONFIG_FRAME_WARN),0) |
| KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) |
| endif |
| |
| stackp-flags-y := -fno-stack-protector |
| stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
| stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong |
| |
| KBUILD_CFLAGS += $(stackp-flags-y) |
| |
| KBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror |
| KBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds |
| |
| KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings |
| KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y) |
| |
| ifdef CONFIG_CC_IS_CLANG |
| KBUILD_CPPFLAGS += -Qunused-arguments |
| # The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable. |
| KBUILD_CFLAGS += -Wno-gnu |
| else |
| |
| # gcc inanely warns about local variables called 'main' |
| KBUILD_CFLAGS += -Wno-main |
| endif |
| |
| # These warnings generated too much noise in a regular build. |
| # Use make W=1 to enable them (see scripts/Makefile.extrawarn) |
| KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) |
| KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
| |
| # These result in bogus false positives |
| KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer) |
| |
| 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 0xAA pattern. |
| ifdef CONFIG_INIT_STACK_ALL_PATTERN |
| KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern |
| endif |
| |
| # 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 |
| KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang |
| endif |
| endif |
| |
| # While VLAs have been removed, GCC produces unreachable stack probes |
| # for the randomize_kstack_offset feature. Disable it for all compilers. |
| KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) |
| |
| # Clear used registers at func exit (to reduce data lifetime and ROP gadgets). |
| ifdef CONFIG_ZERO_CALL_USED_REGS |
| KBUILD_CFLAGS += -fzero-call-used-regs=used-gpr |
| endif |
| |
| ifdef CONFIG_FUNCTION_TRACER |
| ifdef CONFIG_FTRACE_MCOUNT_USE_CC |
| CC_FLAGS_FTRACE += -mrecord-mcount |
| ifdef CONFIG_HAVE_NOP_MCOUNT |
| ifeq ($(call cc-option-yn, -mnop-mcount),y) |
| CC_FLAGS_FTRACE += -mnop-mcount |
| CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT |
| endif |
| endif |
| endif |
| ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL |
| CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT |
| 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 |
| endif |
| endif |
| export CC_FLAGS_FTRACE |
| KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) |
| KBUILD_AFLAGS += $(CC_FLAGS_USING) |
| endif |
| |
| # We trigger additional mismatches with less inlining |
| ifdef CONFIG_DEBUG_SECTION_MISMATCH |
| 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_SHADOW_CALL_STACK |
| CC_FLAGS_SCS := -fsanitize=shadow-call-stack |
| KBUILD_CFLAGS += $(CC_FLAGS_SCS) |
| export CC_FLAGS_SCS |
| endif |
| |
| ifdef CONFIG_LTO_CLANG |
| ifdef CONFIG_LTO_CLANG_THIN |
| CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit |
| KBUILD_LDFLAGS += --thinlto-cache-dir=$(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 |
| |
| # Check for frame size exceeding threshold during prolog/epilog insertion |
| # when using lld < 13.0.0. |
| ifneq ($(CONFIG_FRAME_WARN),0) |
| ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0) |
| KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) |
| endif |
| endif |
| endif |
| |
| ifdef CONFIG_LTO |
| KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) |
| KBUILD_AFLAGS += -fno-lto |
| export CC_FLAGS_LTO |
| endif |
| |
| ifdef CONFIG_CFI_CLANG |
| CC_FLAGS_CFI := -fsanitize=kcfi |
| KBUILD_CFLAGS += $(CC_FLAGS_CFI) |
| export CC_FLAGS_CFI |
| endif |
| |
| ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B |
| KBUILD_CFLAGS += -falign-functions=64 |
| endif |
| |
| # arch Makefile may override CC so keep this after arch Makefile is included |
| NOSTDINC_FLAGS += -nostdinc |
| |
| # warn about C99 declaration after statement |
| KBUILD_CFLAGS += -Wdeclaration-after-statement |
| |
| # Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
| KBUILD_CFLAGS += -Wvla |
| |
| # disable pointer signed / unsigned warnings in gcc 4.0 |
| KBUILD_CFLAGS += -Wno-pointer-sign |
| |
| # In order to make sure new function cast mismatches are not introduced |
| # in the kernel (to avoid tripping CFI checking), the kernel should be |
| # globally built with -Wcast-function-type. |
| KBUILD_CFLAGS += $(call cc-option, -Wcast-function-type) |
| |
| # disable stringop warnings in gcc 8+ |
| KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) |
| |
| # We'll want to enable this eventually, but it's not going away for 5.7 at least |
| KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) |
| |
| # Another good warning that we'll want to enable eventually |
| KBUILD_CFLAGS += $(call cc-disable-warning, restrict) |
| |
| # Enabled with W=2, disabled by default as noisy |
| ifdef CONFIG_CC_IS_GCC |
| KBUILD_CFLAGS += -Wno-maybe-uninitialized |
| endif |
| |
| # The allocators already balk at large sizes, so silence the compiler |
| # warnings for bounds checks involving those possible values. While |
| # -Wno-alloc-size-larger-than would normally be used here, earlier versions |
| # of gcc (<9.1) weirdly don't handle the option correctly when _other_ |
| # warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX |
| # doesn't work (as it is documented to), silently resolving to "0" prior to |
| # version 9.1 (and producing an error more recently). Numeric values larger |
| # than PTRDIFF_MAX also don't work prior to version 9.1, which are silently |
| # ignored, continuing to default to PTRDIFF_MAX. So, left with no other |
| # choice, we must perform a versioned check to disable this warning. |
| # https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au |
| KBUILD_CFLAGS-$(call gcc-min-version, 90100) += -Wno-alloc-size-larger-than |
| KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH) |
| |
| # 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 += -fno-stack-check |
| |
| # conserve stack if available |
| ifdef CONFIG_CC_IS_GCC |
| KBUILD_CFLAGS += -fconserve-stack |
| endif |
| |
| # Prohibit date/time macros, which would make the build non-deterministic |
| KBUILD_CFLAGS += -Werror=date-time |
| |
| # enforce correct pointer usage |
| KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) |
| |
| # Require designated initializers for all marked structures |
| KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) |
| |
| # change __FILE__ to the relative path from the srctree |
| KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) |
| |
| # include additional Makefiles when needed |
| include-y := scripts/Makefile.extrawarn |
| include-$(CONFIG_DEBUG_INFO) += scripts/Makefile.debug |
| 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 |
| |
| include $(addprefix $(srctree)/, $(include-y)) |
| |
| # 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. |
| |
| # Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments |
| KBUILD_CPPFLAGS += $(KCPPFLAGS) |
| KBUILD_AFLAGS += $(KAFLAGS) |
| KBUILD_CFLAGS += $(KCFLAGS) |
| KBUILD_RUSTFLAGS += $(KRUSTFLAGS) |
| |
| KBUILD_LDFLAGS_MODULE += --build-id=sha1 |
| LDFLAGS_vmlinux += --build-id=sha1 |
| |
| 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 += -X |
| endif |
| |
| ifeq ($(CONFIG_RELR),y) |
| LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags |
| 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=warn |
| 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) |
| |
| # the checker needs the correct machine size |
| CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) |
| |
| # 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 |
| |
| 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),) |
| |
| build-dir := . |
| clean-dirs := $(sort . Documentation \ |
| $(patsubst %/,%,$(filter %/, $(core-) \ |
| $(drivers-) $(libs-)))) |
| |
| 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) |
| |
| 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 |
| |
| export KBUILD_VMLINUX_LIBS |
| export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
| |
| # Recurse until adjust_autoksyms.sh is satisfied |
| PHONY += autoksyms_recursive |
| ifdef CONFIG_TRIM_UNUSED_KSYMS |
| # 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) |
| KBUILD_MODULES := 1 |
| |
| autoksyms_recursive: $(build-dir) modules.order |
| $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
| "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive" |
| endif |
| |
| autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
| |
| quiet_cmd_autoksyms_h = GEN $@ |
| cmd_autoksyms_h = mkdir -p $(dir $@); \ |
| $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ |
| |
| $(autoksyms_h): |
| $(call cmd,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 $@ | head -n1) $@ $$($(AR) t $@ | grep -F --file=$(srctree)/scripts/head-object-list.txt) |
| |
| targets += vmlinux.a |
| vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt autoksyms_recursive FORCE |
| $(call if_changed,ar_vmlinux.a) |
| |
| PHONY += vmlinux_o |
| vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS) |
| $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o |
| |
| vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o |
| @: |
| |
| PHONY += vmlinux |
| vmlinux: vmlinux.o $(KBUILD_LDS) modpost |
| $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux |
| |
| # The actual objects are generated when descending, |
| # make sure no implicit rule kicks in |
| $(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ; |
| |
| filechk_kernel.release = \ |
| echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
| |
| # Store (new) KERNELRELEASE string in include/config/kernel.release |
| include/config/kernel.release: FORCE |
| $(call filechk,kernel.release) |
| |
| # Additional helpers built in scripts/ |
| # Carefully list dependencies so we do not try to build scripts twice |
| # in parallel |
| PHONY += scripts |
| scripts: scripts_basic scripts_dtc |
| $(Q)$(MAKE) $(build)=$(@) |
| |
| # 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. |
| |
| PHONY += prepare archprepare |
| |
| archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ |
| asm-generic $(version_h) $(autoksyms_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)=. prepare |
| |
| # All the preparing.. |
| prepare: prepare0 |
| ifdef CONFIG_RUST |
| $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v |
| $(Q)$(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 |
| |
| PHONY += asm-generic uapi-asm-generic |
| asm-generic: uapi-asm-generic |
| $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ |
| generic=include/asm-generic |
| uapi-asm-generic: |
| $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ |
| generic=include/uapi/asm-generic |
| |
| # 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 |
| 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) |
| |
| 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 \ |
| $(srctree)/scripts/headerdep.pl -I$(srctree)/include |
| |
| # --------------------------------------------------------------------------- |
| # Kernel headers |
| |
| #Default location for installed headers |
| export INSTALL_HDR_PATH = $(objtree)/usr |
| |
| 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 |
| |
| hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj |
| |
| 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 |
| |
| 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 |
| |
| # --------------------------------------------------------------------------- |
| # Tools |
| |
| ifdef CONFIG_OBJTOOL |
| prepare: tools/objtool |
| endif |
| |
| ifdef CONFIG_BPF |
| ifdef CONFIG_DEBUG_INFO_BTF |
| prepare: tools/bpf/resolve_btfids |
| endif |
| endif |
| |
| PHONY += resolve_btfids_clean |
| |
| 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 |
| |
| # 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: headers |
| $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
| |
| 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)find $(srctree)/tools/testing/selftests -name config | \ |
| xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config |
| $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig |
| |
| # --------------------------------------------------------------------------- |
| # Devicetree files |
| |
| ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) |
| dtstree := arch/$(SRCARCH)/boot/dts |
| endif |
| |
| ifneq ($(dtstree),) |
| |
| %.dtb: dtbs_prepare |
| $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
| |
| %.dtbo: dtbs_prepare |
| $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
| |
| PHONY += dtbs dtbs_prepare dtbs_install dtbs_check |
| dtbs: dtbs_prepare |
| $(Q)$(MAKE) $(build)=$(dtstree) |
| |
| # 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 |
| dtbs: dt_binding_check |
| endif |
| |
| dtbs_check: dtbs |
| |
| dtbs_install: |
| $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) |
| |
| ifdef CONFIG_OF_EARLY_FLATTREE |
| all: dtbs |
| endif |
| |
| endif |
| |
| PHONY += scripts_dtc |
| 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 |
| |
| ifdef CONFIG_MODULES |
| |
| # By default, build modules as well |
| |
| 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 |
| # |
| |
| # *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFOBTF_MODULES |
| # is an exception. |
| ifdef CONFIG_DEBUG_INFO_BTF_MODULES |
| modules: vmlinux |
| endif |
| |
| modules: modules_prepare |
| |
| # Target to prepare building external modules |
| modules_prepare: prepare |
| $(Q)$(MAKE) $(build)=scripts scripts/module.lds |
| |
| export modules_sign_only := |
| |
| ifeq ($(CONFIG_MODULE_SIG),y) |
| PHONY += modules_sign |
| modules_sign: modules_install |
| @: |
| |
| # modules_sign is a subset of modules_install. |
| # 'make modules_install modules_sign' is equivalent to 'make modules_install'. |
| ifeq ($(filter modules_install,$(MAKECMDGOALS)),) |
| modules_sign_only := y |
| endif |
| endif |
| |
| modinst_pre := |
| ifneq ($(filter modules_install,$(MAKECMDGOALS)),) |
| modinst_pre := __modinst_pre |
| endif |
| |
| modules_install: $(modinst_pre) |
| PHONY += __modinst_pre |
| __modinst_pre: |
| @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 |
| @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order |
| @cp -f modules.builtin $(MODLIB)/ |
| @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ |
| |
| endif # CONFIG_MODULES |
| |
| ### |
| # Cleaning is done on three levels. |
| # make clean Delete most generated files |
| # Leave enough to build external modules |
| # make mrproper Delete the current configuration, and all generated files |
| # make distclean Remove editor backup files, patch leftover files and the like |
| |
| # Directories & files removed with 'make clean' |
| CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ |
| modules.builtin modules.builtin.modinfo modules.nsdeps \ |
| compile_commands.json .thinlto-cache rust/test rust/doc \ |
| .vmlinux.objs .vmlinux.export.c |
| |
| # Directories & files removed with 'make mrproper' |
| MRPROPER_FILES += include/config include/generated \ |
| arch/$(SRCARCH)/include/generated .objdiff \ |
| debian snap tar-install \ |
| .config .config.old .version \ |
| Module.symvers \ |
| certs/signing_key.pem \ |
| certs/x509.genkey \ |
| vmlinux-gdb.py \ |
| *.spec \ |
| rust/target.json rust/libmacros.so |
| |
| # clean - Delete most, but leave enough to build external modules |
| # |
| clean: rm-files := $(CLEAN_FILES) |
| |
| 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 resolve_btfids_clean |
| |
| # mrproper - Delete all generated files, including .config |
| # |
| mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
| mrproper-dirs := $(addprefix _mrproper_,scripts) |
| |
| PHONY += $(mrproper-dirs) mrproper |
| $(mrproper-dirs): |
| $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) |
| |
| mrproper: clean $(mrproper-dirs) |
| $(call cmd,rmfiles) |
| @find . $(RCS_FIND_IGNORE) \ |
| \( -name '*.rmeta' \) \ |
| -type f -print | xargs rm -f |
| |
| # distclean |
| # |
| PHONY += distclean |
| |
| distclean: mrproper |
| @find . $(RCS_FIND_IGNORE) \ |
| \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
| -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
| -o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ |
| -o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ |
| -type f -print | xargs rm -f |
| |
| |
| # Packaging of the kernel to various formats |
| # --------------------------------------------------------------------------- |
| |
| %src-pkg: FORCE |
| $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
| %pkg: include/config/kernel.release FORCE |
| $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
| |
| # Brief documentation of the typical targets used |
| # --------------------------------------------------------------------------- |
| |
| boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
| boards := $(sort $(notdir $(boards))) |
| board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
| board-dirs := $(sort $(notdir $(board-dirs:/=))) |
| |
| PHONY += help |
| help: |
| @echo 'Cleaning targets:' |
| @echo ' clean - Remove most generated files but keep the config and' |
| @echo ' enough build support to build external modules' |
| @echo ' mrproper - Remove all generated files + config + various backup files' |
| @echo ' distclean - mrproper + remove editor backup and patch files' |
| @echo '' |
| @echo 'Configuration targets:' |
| @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help |
| @echo '' |
| @echo 'Other generic targets:' |
| @echo ' all - Build all targets marked with [*]' |
| @echo '* vmlinux - Build the bare kernel' |
| @echo '* modules - Build all modules' |
| @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
| @echo ' dir/ - Build all files in dir and below' |
| @echo ' dir/file.[ois] - Build specified target only' |
| @echo ' dir/file.ll - Build the LLVM assembly file' |
| @echo ' (requires compiler support for LLVM assembly generation)' |
| @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
| @echo ' (requires a recent binutils and recent build (System.map))' |
| @echo ' dir/file.ko - Build module including final link' |
| @echo ' modules_prepare - Set up for building external modules' |
| @echo ' tags/TAGS - Generate tags file for editors' |
| @echo ' cscope - Generate cscope index' |
| @echo ' gtags - Generate GNU GLOBAL index' |
| @echo ' kernelrelease - Output the release version string (use with make -s)' |
| @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' |
| @echo ' image_name - Output the image name (use with make -s)' |
| @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
| echo ' (default: $(INSTALL_HDR_PATH))'; \ |
| echo '' |
| @echo 'Static analysers:' |
| @echo ' checkstack - Generate a list of stack hogs' |
| @echo ' 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 ' 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' |
| @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 $(INSTALL_DTBS_PATH)'; \ |
| echo ' dt_binding_check - Validate device tree binding documents'; \ |
| echo ' dtbs_check - Validate device tree source files';\ |
| echo '') |
| |
| @echo 'Userspace tools targets:' |
| @echo ' use "make tools/help"' |
| @echo ' or "cd tools; make help"' |
| @echo '' |
| @echo 'Kernel packaging:' |
| @$(MAKE) -f $(srctree)/scripts/Makefile.package help |
| @echo '' |
| @echo 'Documentation targets:' |
| @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
| @echo '' |
| @echo 'Architecture specific targets ($(SRCARCH)):' |
| @$(or $(archhelp),\ |
| echo ' No architecture specific help defined for $(SRCARCH)') |
| @echo '' |
| @$(if $(boards), \ |
| $(foreach b, $(boards), \ |
| printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ |
| echo '') |
| @$(if $(board-dirs), \ |
| $(foreach b, $(board-dirs), \ |
| printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ |
| printf " %-16s - Show all of the above\\n" help-boards; \ |
| echo '') |
| |
| @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' |
| @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
| @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
| @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK' |
| @echo ' (sparse by default)' |
| @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
| @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
| @echo ' make W=n [targets] Enable extra build 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 ' e: warnings are being treated as errors' |
| @echo ' Multiple levels can be combined with W=12 or W=123' |
| @echo '' |
| @echo 'Execute "make" or "make all" to build all targets marked with [*] ' |
| @echo 'For further info see the ./README file' |
| |
| |
| help-board-dirs := $(addprefix help-,$(board-dirs)) |
| |
| help-boards: $(help-board-dirs) |
| |
| boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
| |
| $(help-board-dirs): help-%: |
| @echo 'Architecture specific targets ($(SRCARCH) $*):' |
| @$(if $(boards-per-dir), \ |
| $(foreach b, $(boards-per-dir), \ |
| printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ |
| echo '') |
| |
| |
| # Documentation targets |
| # --------------------------------------------------------------------------- |
| DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
| linkcheckdocs dochelp refcheckdocs |
| PHONY += $(DOC_TARGETS) |
| $(DOC_TARGETS): |
| $(Q)$(MAKE) $(build)=Documentation $@ |
| |
| |
| # Rust targets |
| # --------------------------------------------------------------------------- |
| |
| # "Is Rust available?" target |
| PHONY += rustavailable |
| rustavailable: |
| $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v && 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 |
| |
| # IDE support targets |
| PHONY += rust-analyzer |
| rust-analyzer: |
| $(Q)$(MAKE) $(build)=rust $@ |
| |
| # Misc |
| # --------------------------------------------------------------------------- |
| |
| PHONY += scripts_gdb |
| scripts_gdb: prepare0 |
| $(Q)$(MAKE) $(build)=scripts/gdb |
| $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) |
| |
| ifdef CONFIG_GDB_SCRIPTS |
| all: scripts_gdb |
| endif |
| |
| 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. |
| |
| # We are always building only modules. |
| KBUILD_BUILTIN := |
| KBUILD_MODULES := 1 |
| |
| build-dir := $(KBUILD_EXTMOD) |
| |
| compile_commands.json: $(extmod_prefix)compile_commands.json |
| PHONY += compile_commands.json |
| |
| 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 += 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 ' 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 '' |
| |
| endif # KBUILD_EXTMOD |
| |
| # --------------------------------------------------------------------------- |
| # Modules |
| |
| PHONY += modules modules_install modules_prepare |
| |
| 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 $< |
| |
| quiet_cmd_depmod = DEPMOD $(MODLIB) |
| cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
| $(KERNELRELEASE) |
| |
| modules_install: |
| $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
| $(call cmd,depmod) |
| |
| else # CONFIG_MODULES |
| |
| # Modules not configured |
| # --------------------------------------------------------------------------- |
| |
| modules modules_install: |
| @echo >&2 '***' |
| @echo >&2 '*** The present kernel configuration has modules disabled.' |
| @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.' |
| @echo >&2 '*** to enable CONFIG_MODULES.' |
| @echo >&2 '***' |
| @exit 1 |
| |
| 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;) } > $(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,rmfiles) |
| @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
| \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ |
| -o -name '*.ko.*' \ |
| -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ |
| -o -name '*.dwo' -o -name '*.lst' \ |
| -o -name '*.su' -o -name '*.mod' -o -name '*.usyms' \ |
| -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
| -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
| -o -name '*.asn1.[ch]' \ |
| -o -name '*.symtypes' -o -name 'modules.order' \ |
| -o -name '.tmp_*' \ |
| -o -name '*.c.[012]*.*' \ |
| -o -name '*.ll' \ |
| -o -name '*.gcno' \ |
| -o -name '*.*.symversions' \) -type f -print | xargs rm -f |
| |
| # Generate tags for editors |
| # --------------------------------------------------------------------------- |
| quiet_cmd_tags = GEN $@ |
| cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ |
| |
| tags TAGS cscope gtags: FORCE |
| $(call cmd,tags) |
| |
| # 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 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: |
| $(Q)$(BASH) $(srctree)/scripts/$@ |
| |
| export_report: |
| $(PERL) $(srctree)/scripts/export_report.pl |
| |
| 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 $$(find . -name '*.ko') | \ |
| $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
| |
| kernelrelease: |
| @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
| |
| kernelversion: |
| @echo $(KERNELVERSION) |
| |
| image_name: |
| @echo $(KBUILD_IMAGE) |
| |
| quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
| 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 # config-build |
| endif # mixed-build |
| endif # need-sub-make |
| |
| 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) |