diff options
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 462 |
1 files changed, 270 insertions, 192 deletions
@@ -1,9 +1,9 @@ # SPDX-License-Identifier: GPL-2.0 VERSION = 6 -PATCHLEVEL = 8 +PATCHLEVEL = 14 SUBLEVEL = 0 EXTRAVERSION = -NAME = Hurr durr I'ma ninja sloth +NAME = Baby Opossum Posse # *DOCUMENTATION* # To see a list of typical targets execute "make help" @@ -11,8 +11,8 @@ NAME = Hurr durr I'ma ninja sloth # 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 $(MAKE_VERSION)) +ifeq ($(filter output-sync,$(.FEATURES)),) +$(error GNU Make >= 4.0 is required. Your Make version is $(MAKE_VERSION)) endif $(if $(filter __%, $(MAKECMDGOALS)), \ @@ -39,8 +39,8 @@ __all: # prepare rule. this-makefile := $(lastword $(MAKEFILE_LIST)) -export abs_srctree := $(realpath $(dir $(this-makefile))) -export abs_objtree := $(CURDIR) +abs_srctree := $(realpath $(dir $(this-makefile))) +abs_output := $(CURDIR) ifneq ($(sub_make_done),1) @@ -93,15 +93,7 @@ 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 ($(findstring s,$(short-opts)),) +ifneq ($(findstring s,$(firstword -$(MAKEFLAGS))),) quiet=silent_ override KBUILD_VERBOSE := endif @@ -142,6 +134,10 @@ ifeq ("$(origin M)", "command line") KBUILD_EXTMOD := $(M) endif +ifeq ("$(origin MO)", "command line") + KBUILD_EXTMOD_OUTPUT := $(MO) +endif + $(if $(word 2, $(KBUILD_EXTMOD)), \ $(error building multiple external modules is not supported)) @@ -184,36 +180,51 @@ export KBUILD_EXTRA_WARN # The O= assignment takes precedence over the KBUILD_OUTPUT environment # variable. -# Do we want to change the working directory? ifeq ("$(origin O)", "command line") KBUILD_OUTPUT := $(O) endif -ifneq ($(KBUILD_OUTPUT),) +ifdef KBUILD_EXTMOD + ifdef KBUILD_OUTPUT + objtree := $(realpath $(KBUILD_OUTPUT)) + $(if $(objtree),,$(error specified kernel directory "$(KBUILD_OUTPUT)" does not exist)) + else + objtree := $(abs_srctree) + endif + # If Make is invoked from the kernel directory (either kernel + # source directory or kernel build directory), external modules + # are built in $(KBUILD_EXTMOD) for backward compatibility, + # otherwise, built in the current directory. + output := $(or $(KBUILD_EXTMOD_OUTPUT),$(if $(filter $(CURDIR),$(objtree) $(abs_srctree)),$(KBUILD_EXTMOD))) + # KBUILD_EXTMOD might be a relative path. Remember its absolute path before + # Make changes the working directory. + srcroot := $(realpath $(KBUILD_EXTMOD)) + $(if $(srcroot),,$(error specified external module directory "$(KBUILD_EXTMOD)" does not exist)) +else + objtree := . + output := $(KBUILD_OUTPUT) +endif + +export objtree srcroot + +# Do we want to change the working directory? +ifneq ($(output),) # $(realpath ...) gets empty if the path does not exist. Run 'mkdir -p' first. -$(shell mkdir -p "$(KBUILD_OUTPUT)") +$(shell mkdir -p "$(output)") # $(realpath ...) resolves symlinks -abs_objtree := $(realpath $(KBUILD_OUTPUT)) -$(if $(abs_objtree),,$(error failed to create output directory "$(KBUILD_OUTPUT)")) -endif # ifneq ($(KBUILD_OUTPUT),) +abs_output := $(realpath $(output)) +$(if $(abs_output),,$(error failed to create output directory "$(output)")) +endif ifneq ($(words $(subst :, ,$(abs_srctree))), 1) $(error source directory cannot contain spaces or colons) endif -ifneq ($(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 sub_make_done := 1 endif # sub_make_done -ifeq ($(abs_objtree),$(CURDIR)) +ifeq ($(abs_output),$(CURDIR)) # Suppress "Entering directory ..." if we are at the final work directory. no-print-directory := --no-print-directory else @@ -237,35 +248,40 @@ $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make # Invoke a second make in the output directory, passing relevant variables __sub-make: - $(Q)$(MAKE) $(no-print-directory) -C $(abs_objtree) \ + $(Q)$(MAKE) $(no-print-directory) -C $(abs_output) \ -f $(abs_srctree)/Makefile $(MAKECMDGOALS) else # need-sub-make # We process the rest of the Makefile if this is the final invocation of make -ifeq ($(abs_srctree),$(abs_objtree)) - # building in the source tree - srctree := . - building_out_of_srctree := +ifndef KBUILD_EXTMOD +srcroot := $(abs_srctree) +endif + +ifeq ($(srcroot),$(CURDIR)) +building_out_of_srctree := else - ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) - # building in a subdirectory of the source tree - srctree := .. - else - srctree := $(abs_srctree) - endif - building_out_of_srctree := 1 +export building_out_of_srctree := 1 endif -ifneq ($(KBUILD_ABS_SRCTREE),) -srctree := $(abs_srctree) +ifdef KBUILD_ABS_SRCTREE + # Do nothing. Use the absolute path. +else ifeq ($(srcroot),$(CURDIR)) + # Building in the source. + srcroot := . +else ifeq ($(srcroot)/,$(dir $(CURDIR))) + # Building in a subdirectory of the source. + srcroot := .. endif -objtree := . -VPATH := $(srctree) +export srctree := $(if $(KBUILD_EXTMOD),$(abs_srctree),$(srcroot)) -export building_out_of_srctree srctree objtree VPATH +ifdef building_out_of_srctree +export VPATH := $(srcroot) +else +VPATH := +endif # 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 @@ -285,7 +301,7 @@ no-dot-config-targets := $(clean-targets) \ outputmakefile rustavailable rustfmt rustfmtcheck no-sync-config-targets := $(no-dot-config-targets) %install modules_sign kernelrelease \ image_name -single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/ +single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %/ config-build := mixed-build := @@ -295,51 +311,51 @@ single-build := ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) - need-config := + need-config := endif endif ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) - may-sync-config := + may-sync-config := endif endif need-compiler := $(may-sync-config) ifneq ($(KBUILD_EXTMOD),) - may-sync-config := + may-sync-config := endif ifeq ($(KBUILD_EXTMOD),) - ifneq ($(filter %config,$(MAKECMDGOALS)),) - config-build := 1 - ifneq ($(words $(MAKECMDGOALS)),1) - mixed-build := 1 - endif + ifneq ($(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), $(MAKECMDGOALS)),) - single-build := 1 + single-build := 1 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) - mixed-build := 1 + mixed-build := 1 endif endif # For "make -j clean all", "make -j mrproper defconfig all", etc. ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) - ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) - mixed-build := 1 - endif + 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 + ifneq ($(filter modules_install,$(MAKECMDGOALS)),) + mixed-build := 1 + endif endif ifdef mixed-build @@ -363,7 +379,7 @@ else # !mixed-build include $(srctree)/scripts/Kbuild.include # Read KERNELRELEASE from include/config/kernel.release (if it exists) -KERNELRELEASE = $(call read-file, include/config/kernel.release) +KERNELRELEASE = $(call read-file, $(objtree)/include/config/kernel.release) KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION @@ -454,25 +470,34 @@ KBUILD_USERLDFLAGS := $(USERLDFLAGS) # 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 \ + -Astable_features \ + -Dnon_ascii_idents \ + -Dunsafe_op_in_unsafe_fn \ -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) + -Wrust_2018_idioms \ + -Wunreachable_pub \ + -Wclippy::all \ + -Wclippy::ignored_unit_patterns \ + -Wclippy::mut_mut \ + -Wclippy::needless_bitwise_bool \ + -Wclippy::needless_continue \ + -Aclippy::needless_lifetimes \ + -Wclippy::no_mangle_with_rust_abi \ + -Wclippy::undocumented_unsafe_blocks \ + -Wclippy::unnecessary_safety_comment \ + -Wclippy::unnecessary_safety_doc \ + -Wrustdoc::missing_crate_level_docs \ + -Wrustdoc::unescaped_backticks + +KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) \ + $(HOSTCFLAGS) -I $(srctree)/scripts/include +KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) \ + -I $(srctree)/scripts/include KBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \ -Zallow-features= $(HOSTRUSTFLAGS) KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) +KBUILD_PROCMACROLDFLAGS := $(or $(PROCMACROLDFLAGS),$(KBUILD_HOSTLDFLAGS)) # Make variables (CC, etc...) CPP = $(CC) -E @@ -500,7 +525,6 @@ RUSTDOC = rustdoc RUSTFMT = rustfmt CLIPPY_DRIVER = clippy-driver BINDGEN = bindgen -CARGO = cargo PAHOLE = pahole RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids LEX = flex @@ -515,7 +539,7 @@ KGZIP = gzip KBZIP2 = bzip2 KLZOP = lzop LZMA = lzma -LZ4 = lz4c +LZ4 = lz4 XZ = xz ZSTD = zstd @@ -545,7 +569,7 @@ USERINCLUDE := \ LINUXINCLUDE := \ -I$(srctree)/arch/$(SRCARCH)/include \ -I$(objtree)/arch/$(SRCARCH)/include/generated \ - $(if $(building_out_of_srctree),-I$(srctree)/include) \ + -I$(srctree)/include \ -I$(objtree)/include \ $(USERINCLUDE) @@ -561,13 +585,12 @@ KBUILD_CFLAGS += -fno-strict-aliasing KBUILD_CPPFLAGS := -D__KERNEL__ KBUILD_RUSTFLAGS := $(rust_common_flags) \ - --target=$(objtree)/scripts/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 + -Wclippy::float_arithmetic KBUILD_AFLAGS_KERNEL := KBUILD_CFLAGS_KERNEL := @@ -587,20 +610,19 @@ else 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 +# Allows finding `.clippy.toml` in out-of-srctree builds. +export CLIPPY_CONF_DIR := $(srctree) + 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 RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN 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_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS KBUILD_PROCMACROLDFLAGS LDFLAGS_MODULE export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS @@ -633,13 +655,25 @@ ifdef building_out_of_srctree # At the same time when output Makefile generated, generate .gitignore to # ignore whole output directory +ifdef KBUILD_EXTMOD +print_env_for_makefile = \ + echo "export KBUILD_OUTPUT = $(objtree)"; \ + echo "export KBUILD_EXTMOD = $(realpath $(srcroot))" ; \ + echo "export KBUILD_EXTMOD_OUTPUT = $(CURDIR)" +else +print_env_for_makefile = \ + echo "export KBUILD_OUTPUT = $(CURDIR)" +endif + quiet_cmd_makefile = GEN Makefile cmd_makefile = { \ - echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ - echo "include $(srctree)/Makefile"; \ + echo "\# Automatically generated by $(abs_srctree)/Makefile: don't edit"; \ + $(print_env_for_makefile); \ + echo "include $(abs_srctree)/Makefile"; \ } > Makefile outputmakefile: +ifeq ($(KBUILD_EXTMOD),) @if [ -f $(srctree)/.config -o \ -d $(srctree)/include/config -o \ -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ @@ -649,7 +683,16 @@ outputmakefile: echo >&2 "***"; \ false; \ fi - $(Q)ln -fsn $(srctree) source +else + @if [ -f $(srcroot)/modules.order ]; then \ + echo >&2 "***"; \ + echo >&2 "*** The external module source tree is not clean."; \ + echo >&2 "*** Please run 'make -C $(abs_srctree) M=$(realpath $(srcroot)) clean'"; \ + echo >&2 "***"; \ + false; \ + fi +endif + $(Q)ln -fsn $(srcroot) source $(call cmd,makefile) $(Q)test -e .gitignore || \ { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore @@ -657,9 +700,11 @@ endif # The expansion should be delayed until arch/$(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 and RUSTC_VERSION_TEXT are referenced from Kconfig (so they +# need 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)) +RUSTC_VERSION_TEXT = $(subst $(pound),,$(shell $(RUSTC) --version 2>/dev/null)) ifneq ($(findstring clang,$(CC_VERSION_TEXT)),) include $(srctree)/scripts/Makefile.clang @@ -680,7 +725,7 @@ ifdef config-build # 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 +export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT RUSTC_VERSION_TEXT config: outputmakefile scripts_basic FORCE $(Q)$(MAKE) $(build)=scripts/kconfig $@ @@ -719,7 +764,7 @@ endif # in addition to whatever we do anyway. # Just "make" or "make all" shall build modules as well -ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) +ifneq ($(filter all modules nsdeps compile_commands.json clang-%,$(MAKECMDGOALS)),) KBUILD_MODULES := 1 endif @@ -730,7 +775,7 @@ endif export KBUILD_MODULES KBUILD_BUILTIN ifdef need-config -include include/config/auto.conf +include $(objtree)/include/config/auto.conf endif ifeq ($(KBUILD_EXTMOD),) @@ -791,17 +836,22 @@ $(KCONFIG_CONFIG): 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) +# Use auto.conf to show the error message + +checked-configs := $(addprefix $(objtree)/, include/generated/autoconf.h include/generated/rustc_cfg include/config/auto.conf) +missing-configs := $(filter-out $(wildcard $(checked-configs)), $(checked-configs)) + +ifdef missing-configs +PHONY += $(objtree)/include/config/auto.conf + +$(objtree)/include/config/auto.conf: + @echo >&2 '***' + @echo >&2 '*** ERROR: Kernel configuration is invalid. The following files are missing:' + @printf >&2 '*** - %s\n' $(missing-configs) + @echo >&2 '*** Run "make oldconfig && make prepare" on kernel source to fix it.' + @echo >&2 '***' + @/bin/false +endif endif # may-sync-config endif # need-config @@ -936,6 +986,7 @@ ifdef CONFIG_SHADOW_CALL_STACK ifndef CONFIG_DYNAMIC_SCS CC_FLAGS_SCS := -fsanitize=shadow-call-stack KBUILD_CFLAGS += $(CC_FLAGS_SCS) +KBUILD_RUSTFLAGS += -Zsanitizer=shadow-call-stack endif export CC_FLAGS_SCS endif @@ -943,7 +994,6 @@ endif ifdef CONFIG_LTO_CLANG ifdef CONFIG_LTO_CLANG_THIN CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit -KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache else CC_FLAGS_LTO := -flto endif @@ -951,14 +1001,6 @@ 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 ($(CONFIG_FRAME_WARN),0) -ifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y) -KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) -endif -endif endif ifdef CONFIG_LTO @@ -969,13 +1011,35 @@ endif ifdef CONFIG_CFI_CLANG CC_FLAGS_CFI := -fsanitize=kcfi +ifdef CONFIG_CFI_ICALL_NORMALIZE_INTEGERS + CC_FLAGS_CFI += -fsanitize-cfi-icall-experimental-normalize-integers +endif +ifdef CONFIG_RUST + # Always pass -Zsanitizer-cfi-normalize-integers as CONFIG_RUST selects + # CONFIG_CFI_ICALL_NORMALIZE_INTEGERS. + RUSTC_FLAGS_CFI := -Zsanitizer=kcfi -Zsanitizer-cfi-normalize-integers + KBUILD_RUSTFLAGS += $(RUSTC_FLAGS_CFI) + export RUSTC_FLAGS_CFI +endif KBUILD_CFLAGS += $(CC_FLAGS_CFI) export CC_FLAGS_CFI endif +# Architectures can define flags to add/remove for floating-point support +CC_FLAGS_FPU += -D_LINUX_FPU_COMPILATION_UNIT +export CC_FLAGS_FPU +export CC_FLAGS_NO_FPU + ifneq ($(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 # arch Makefile may override CC so keep this after arch Makefile is included NOSTDINC_FLAGS += -nostdinc @@ -1001,8 +1065,10 @@ ifdef CONFIG_CC_IS_GCC KBUILD_CFLAGS += -fconserve-stack endif -# change __FILE__ to the relative path from the srctree -KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) +# change __FILE__ to the relative path to the source directory +ifdef building_out_of_srctree +KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srcroot)/=) +endif # include additional Makefiles when needed include-y := scripts/Makefile.extrawarn @@ -1014,6 +1080,8 @@ 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-$(CONFIG_AUTOFDO_CLANG) += scripts/Makefile.autofdo +include-$(CONFIG_PROPELLER_CLANG) += scripts/Makefile.propeller include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins include $(addprefix $(srctree)/, $(include-y)) @@ -1052,8 +1120,13 @@ LDFLAGS_vmlinux += --orphan-handling=$(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)) +KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)) +KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)) + +# userspace programs are linked via the compiler, use the correct linker +ifeq ($(CONFIG_CC_IS_CLANG)$(CONFIG_LD_IS_LLD),yy) +KBUILD_USERLDFLAGS += --ld-path=$(LD) +endif # make the checker run with the right architecture CHECKFLAGS += --arch=$(ARCH) @@ -1094,10 +1167,6 @@ 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 := . @@ -1192,7 +1261,8 @@ PHONY += prepare archprepare 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 + include/generated/compile.h include/generated/autoconf.h \ + include/generated/rustc_cfg remove-stale-files prepare0: archprepare $(Q)$(MAKE) $(build)=scripts/mod @@ -1201,7 +1271,7 @@ prepare0: archprepare # All the preparing.. prepare: prepare0 ifdef CONFIG_RUST - $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh + +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh $(Q)$(MAKE) $(build)=rust endif @@ -1210,7 +1280,7 @@ 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 +asm-generic := -f $(srctree)/scripts/Makefile.asm-headers obj PHONY += asm-generic uapi-asm-generic asm-generic: uapi-asm-generic @@ -1250,8 +1320,8 @@ define filechk_version.h echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) endef -$(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0) -$(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0) +$(version_h): private PATCHLEVEL := $(or $(PATCHLEVEL), 0) +$(version_h): private SUBLEVEL := $(or $(SUBLEVEL), 0) $(version_h): FORCE $(call filechk,version.h) @@ -1303,6 +1373,10 @@ PHONY += scripts_unifdef scripts_unifdef: scripts_basic $(Q)$(MAKE) $(build)=scripts scripts/unifdef +PHONY += scripts_gen_packed_field_checks +scripts_gen_packed_field_checks: scripts_basic + $(Q)$(MAKE) $(build)=scripts scripts/gen_packed_field_checks + # --------------------------------------------------------------------------- # Install @@ -1335,6 +1409,12 @@ prepare: tools/bpf/resolve_btfids endif endif +# The tools build system is not a part of Kbuild and tends to introduce +# its own unique issues. If you need to integrate a new tool into Kbuild, +# please consider locating that tool outside the tools/ tree and using the +# standard Kbuild "hostprogs" syntax instead of adding a new tools/* entry +# here. See Documentation/kbuild/makefiles.rst for details. + PHONY += resolve_btfids_clean resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids @@ -1346,18 +1426,13 @@ ifneq ($(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/ + $(Q)$(MAKE) LDFLAGS= 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/ $* + $(Q)$(MAKE) LDFLAGS= O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* # --------------------------------------------------------------------------- # Kernel selftest @@ -1393,7 +1468,7 @@ ifneq ($(dtstree),) PHONY += dtbs dtbs_prepare dtbs_install dtbs_check dtbs: dtbs_prepare - $(Q)$(MAKE) $(build)=$(dtstree) + $(Q)$(MAKE) $(build)=$(dtstree) need-dtbslist=1 # include/config/kernel.release is actually needed when installing DTBs because # INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make @@ -1405,18 +1480,22 @@ export CHECK_DTBS=y endif ifneq ($(CHECK_DTBS),) -dtbs_prepare: dt_binding_check +dtbs_prepare: dt_binding_schemas endif dtbs_check: dtbs dtbs_install: - $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.dtbinst obj=$(dtstree) ifdef CONFIG_OF_EARLY_FLATTREE all: dtbs endif +ifdef CONFIG_GENERIC_BUILTIN_DTB +vmlinux: dtbs +endif + endif PHONY += scripts_dtc @@ -1424,15 +1503,18 @@ scripts_dtc: scripts_basic $(Q)$(MAKE) $(build)=scripts/dtc ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) -export CHECK_DT_BINDING=y +export CHECK_DTBS=y endif -PHONY += dt_binding_check -dt_binding_check: scripts_dtc +PHONY += dt_binding_check dt_binding_schemas +dt_binding_check: dt_binding_schemas scripts_dtc + $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@ + +dt_binding_schemas: $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings PHONY += dt_compatible_check -dt_compatible_check: dt_binding_check +dt_compatible_check: dt_binding_schemas $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings $@ # --------------------------------------------------------------------------- @@ -1479,24 +1561,26 @@ endif # CONFIG_MODULES # Directories & files removed with 'make clean' CLEAN_FILES += vmlinux.symvers modules-only.symvers \ modules.builtin modules.builtin.modinfo modules.nsdeps \ - compile_commands.json .thinlto-cache rust/test \ - rust-project.json .vmlinux.objs .vmlinux.export.c + modules.builtin.ranges vmlinux.o.map \ + compile_commands.json rust/test \ + rust-project.json .vmlinux.objs .vmlinux.export.c \ + .builtin-dtbs-list .builtin-dtb.S # Directories & files removed with 'make mrproper' MRPROPER_FILES += include/config include/generated \ arch/$(SRCARCH)/include/generated .objdiff \ - debian snap tar-install \ + debian snap tar-install PKGBUILD pacman \ .config .config.old .version \ Module.symvers \ certs/signing_key.pem \ certs/x509.genkey \ vmlinux-gdb.py \ rpmbuild \ - rust/libmacros.so + rust/libmacros.so rust/libmacros.dylib # clean - Delete most, but leave enough to build external modules # -clean: rm-files := $(CLEAN_FILES) +clean: private rm-files := $(CLEAN_FILES) PHONY += archclean vmlinuxclean @@ -1508,7 +1592,7 @@ clean: archclean vmlinuxclean resolve_btfids_clean # mrproper - Delete all generated files, including .config # -mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) +mrproper: private rm-files := $(MRPROPER_FILES) mrproper-dirs := $(addprefix _mrproper_,scripts) PHONY += $(mrproper-dirs) mrproper @@ -1588,7 +1672,6 @@ help: @echo ' with a stack size larger than MINSTACKSIZE (default: 100)' @echo ' versioncheck - Sanity check on version.h usage' @echo ' includecheck - Check for duplicate included header files' - @echo ' export_report - List the usages of all exported symbols' @echo ' headerdep - Detect inclusion cycles in headers' @echo ' coccicheck - Check with Coccinelle' @echo ' clang-analyzer - Check with clang static analyzer' @@ -1628,10 +1711,11 @@ help: @echo '' @$(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 '* 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 and examples'; \ + echo ' dt_binding_schemas - Build processed device tree binding schemas'; \ + echo ' dtbs_check - Validate device tree source files';\ echo '') @echo 'Userspace tools targets:' @@ -1711,7 +1795,7 @@ $(DOC_TARGETS): # "Is Rust available?" target PHONY += rustavailable rustavailable: - $(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh && echo "Rust is available!" + +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh && echo "Rust is available!" # Documentation target # @@ -1728,18 +1812,9 @@ rusttest: prepare # 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 \ + $(Q)find $(srctree) $(RCS_FIND_IGNORE) \ + -type f -a -name '*.rs' -a ! -name '*generated*' -print \ | xargs $(RUSTFMT) $(rustfmt_flags) rustfmtcheck: rustfmt_flags = --check @@ -1778,14 +1853,10 @@ filechk_kernel.release = echo $(KERNELRELEASE) KBUILD_BUILTIN := KBUILD_MODULES := 1 -build-dir := $(KBUILD_EXTMOD) +build-dir := . -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 $(KBUILD_EXTMOD)/.thinlto-cache +clean-dirs := . +clean: private rm-files := Module.symvers modules.nsdeps compile_commands.json PHONY += prepare # now expand this into a simple variable to reduce the cost of shell evaluations @@ -1844,7 +1915,7 @@ endif ifdef CONFIG_MODULES -$(MODORDER): $(build-dir) +modules.order: $(build-dir) @: # KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. @@ -1855,7 +1926,7 @@ ifneq ($(KBUILD_MODPOST_NOFINAL),1) endif PHONY += modules_check -modules_check: $(MODORDER) +modules_check: modules.order $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< else # CONFIG_MODULES @@ -1896,15 +1967,15 @@ $(single-ko): single_modules $(single-no-ko): $(build-dir) @: -# Remove MODORDER when done because it is not the real one. +# Remove modules.order 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){ $(foreach m, $(single-ko), echo $(m:%.ko=%.o);) } > modules.order $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost ifneq ($(KBUILD_MODPOST_NOFINAL),1) $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal endif - $(Q)rm -f $(MODORDER) + $(Q)rm -f modules.order single-goals := $(addprefix $(build-dir)/, $(single-no-ko)) @@ -1912,6 +1983,8 @@ KBUILD_MODULES := 1 endif +prepare: outputmakefile + # 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. @@ -1927,12 +2000,12 @@ $(clean-dirs): clean: $(clean-dirs) $(call cmd,rmfiles) - @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ + @find . $(RCS_FIND_IGNORE) \ \( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \ -o -name '*.ko.*' \ -o -name '*.dtb' -o -name '*.dtbo' \ -o -name '*.dtb.S' -o -name '*.dtbo.S' \ - -o -name '*.dt.yaml' \ + -o -name '*.dt.yaml' -o -name 'dtbs-list' \ -o -name '*.dwo' -o -name '*.lst' \ -o -name '*.su' -o -name '*.mod' \ -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ @@ -1942,7 +2015,7 @@ clean: $(clean-dirs) -o -name '*.c.[012]*.*' \ -o -name '*.ll' \ -o -name '*.gcno' \ - -o -name '*.*.symversions' \) -type f -print \ + \) -type f -print \ -o -name '.tmp_*' -print \ | xargs rm -rf @@ -1954,10 +2027,18 @@ quiet_cmd_tags = GEN $@ tags TAGS cscope gtags: FORCE $(call cmd,tags) -# IDE support targets +# Generate rust-project.json (a file that describes the structure of non-Cargo +# Rust projects) for rust-analyzer (an implementation of the Language Server +# Protocol). PHONY += rust-analyzer rust-analyzer: + +$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh +ifdef KBUILD_EXTMOD +# FIXME: external modules must not descend into a sub-directory of the kernel + $(Q)$(MAKE) $(build)=$(objtree)/rust src=$(srctree)/rust $@ +else $(Q)$(MAKE) $(build)=rust $@ +endif # Script to generate missing namespace dependencies # --------------------------------------------------------------------------- @@ -1973,12 +2054,12 @@ nsdeps: modules 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 \ +compile_commands.json: $(srctree)/scripts/clang-tools/gen_compile_commands.py \ $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ - $(if $(CONFIG_MODULES), $(MODORDER)) FORCE + $(if $(CONFIG_MODULES), modules.order) FORCE $(call if_changed,gen_compile_commands) -targets += $(extmod_prefix)compile_commands.json +targets += compile_commands.json PHONY += clang-tidy clang-analyzer @@ -1986,7 +2067,7 @@ 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 +clang-tidy clang-analyzer: compile_commands.json $(call cmd,clang_tools) else clang-tidy clang-analyzer: @@ -1997,7 +2078,7 @@ endif # Scripts to check various things for consistency # --------------------------------------------------------------------------- -PHONY += includecheck versioncheck coccicheck export_report +PHONY += includecheck versioncheck coccicheck includecheck: find $(srctree)/* $(RCS_FIND_IGNORE) \ @@ -2012,9 +2093,6 @@ versioncheck: 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 |