# 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 \
+ headers_install modules_install modules_sign kernelrelease image_name
+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 %/
YACC = bison
AWK = awk
INSTALLKERNEL := installkernel
-DEPMOD = depmod
PERL = perl
PYTHON3 = python3
CHECK = sparse
KBUILD_CFLAGS += -fno-common
KBUILD_CFLAGS += -fno-PIE
KBUILD_CFLAGS += -fno-strict-aliasing
-KBUILD_CFLAGS += -Wall
-KBUILD_CFLAGS += -Wundef
-KBUILD_CFLAGS += -Werror=implicit-function-declaration
-KBUILD_CFLAGS += -Werror=implicit-int
-KBUILD_CFLAGS += -Werror=return-type
-KBUILD_CFLAGS += -Werror=strict-prototypes
-KBUILD_CFLAGS += -Wno-format-security
-KBUILD_CFLAGS += -Wno-trigraphs
KBUILD_CPPFLAGS := -D__KERNEL__
KBUILD_RUSTFLAGS := $(rust_common_flags) \
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 += $(call cc-disable-warning, address-of-packed-member)
ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
KBUILD_CFLAGS += -O2
KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
endif
-ifneq ($(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 += $(stackp-flags-y)
-KBUILD_CPPFLAGS-$(CONFIG_WERROR) += -Werror
-KBUILD_CPPFLAGS += $(KBUILD_CPPFLAGS-y)
-KBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds
-
KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings
KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)
-ifdef CONFIG_CC_IS_CLANG
-# 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
# arch Makefile may override CC so keep this after arch Makefile is included
NOSTDINC_FLAGS += -nostdinc
-# 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)
-
# To gain proper coverage for CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE,
# the kernel uses only C99 flexible arrays for dynamically sized trailing
# arrays. Enforce this for everything that may examine structure sizes and
# perform bounds checking.
KBUILD_CFLAGS += $(call cc-option, -fstrict-flex-arrays=3)
-# 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
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)/=)
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
-
endif # CONFIG_MODULES
-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)
-ifdef CONFIG_MODULES
- @ln -s $(abspath $(srctree)) $(MODLIB)/source
- @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
- rm -f $(MODLIB)/build ; \
- ln -s $(CURDIR) $(MODLIB)/build ; \
- fi
- @sed 's:^\(.*\)\.o$$:kernel/\1.ko:' modules.order > $(MODLIB)/modules.order
-endif
- @cp -f modules.builtin $(MODLIB)/
- @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
-
###
# Cleaning is done on three levels.
# make clean Delete most generated files
# make distclean Remove editor backup files, patch leftover files and the like
# Directories & files removed with 'make clean'
-CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
+CLEAN_FILES += vmlinux.symvers modules-only.symvers \
modules.builtin modules.builtin.modinfo modules.nsdeps \
compile_commands.json .thinlto-cache rust/test rust/doc \
rust-project.json .vmlinux.objs .vmlinux.export.c
certs/signing_key.pem \
certs/x509.genkey \
vmlinux-gdb.py \
- *.spec rpmbuild \
+ kernel.spec rpmbuild \
rust/libmacros.so
# clean - Delete most, but leave enough to build external modules
@echo ' mrproper - Remove all generated files + config + various backup files'
@echo ' distclean - mrproper + remove editor backup and patch files'
@echo ''
- @echo 'Configuration targets:'
@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
@echo ''
@echo 'Other generic targets:'
@echo ' rust-analyzer - generate rust-project.json rust-analyzer support file'
@echo ''
+ifndef CONFIG_MODULES
+modules modules_install: __external_modules_error
__external_modules_error:
@echo >&2 '***'
@echo >&2 '*** The present kernel disabled CONFIG_MODULES.'
@echo >&2 '*** You cannot build or install external modules.'
@echo >&2 '***'
@false
+endif
endif # KBUILD_EXTMOD
# ---------------------------------------------------------------------------
# Modules
-PHONY += modules modules_install modules_prepare
+PHONY += modules modules_install modules_sign modules_prepare
+
+modules_install:
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst \
+ sign-only=$(if $(filter modules_install,$(MAKECMDGOALS)),,y)
+
+ifeq ($(CONFIG_MODULE_SIG),y)
+# modules_sign is a subset of modules_install.
+# 'make modules_install modules_sign' is equivalent to 'make modules_install'.
+modules_sign: modules_install
+ @:
+else
+modules_sign:
+ @echo >&2 '***'
+ @echo >&2 '*** CONFIG_MODULE_SIG is disabled. You cannot sign modules.'
+ @echo >&2 '***'
+ @false
+endif
ifdef CONFIG_MODULES
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
-# ---------------------------------------------------------------------------
-
-PHONY += __external_modules_error
-
-modules modules_install: __external_modules_error
+modules:
@:
KBUILD_MODULES :=
image_name:
@echo $(KBUILD_IMAGE)
+PHONY += run-command
+run-command:
+ $(Q)$(KBUILD_RUN_COMMAND)
+
quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
cmd_rmfiles = rm -rf $(rm-files)
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