diff options
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 111 |
1 files changed, 51 insertions, 60 deletions
@@ -186,6 +186,10 @@ endif # Old syntax make ... SUBDIRS=$PWD is still supported # Setting the environment variable KBUILD_EXTMOD take precedence ifdef SUBDIRS + $(warning ================= WARNING ================) + $(warning 'SUBDIRS' will be removed after Linux 5.3) + $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) + $(warning ==========================================) KBUILD_EXTMOD ?= $(SUBDIRS) endif @@ -422,10 +426,10 @@ LINUXINCLUDE := \ -I$(objtree)/include \ $(USERINCLUDE) -KBUILD_AFLAGS := -D__ASSEMBLY__ -KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ - -fno-strict-aliasing -fno-common -fshort-wchar \ - -Werror-implicit-function-declaration \ +KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE +KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ + -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ + -Werror-implicit-function-declaration -Werror=implicit-int \ -Wno-format-security \ -std=gnu89 KBUILD_CPPFLAGS := -D__KERNEL__ @@ -487,18 +491,18 @@ endif ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) ifneq ($(CROSS_COMPILE),) -CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%)) +CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) GCC_TOOLCHAIN_DIR := $(dir $(shell which $(LD))) -CLANG_PREFIX := --prefix=$(GCC_TOOLCHAIN_DIR) +CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) endif ifneq ($(GCC_TOOLCHAIN),) -CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN) +CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) endif -KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) $(CLANG_PREFIX) -KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) $(CLANG_PREFIX) -KBUILD_CFLAGS += $(call cc-option, -no-integrated-as) -KBUILD_AFLAGS += $(call cc-option, -no-integrated-as) +CLANG_FLAGS += -no-integrated-as +KBUILD_CFLAGS += $(CLANG_FLAGS) +KBUILD_AFLAGS += $(CLANG_FLAGS) +export CLANG_FLAGS endif RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register @@ -510,9 +514,6 @@ RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc export RETPOLINE_CFLAGS export RETPOLINE_VDSO_CFLAGS -KBUILD_CFLAGS += $(call cc-option,-fno-PIE) -KBUILD_AFLAGS += $(call cc-option,-fno-PIE) - # check for 'asm goto' ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y) CC_HAVE_ASM_GOTO := 1 @@ -828,12 +829,6 @@ KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) # conserve stack if available KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) -# disallow errors like 'EXPORT_GPL(foo);' with missing header -KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) - -# require functions to have arguments in prototypes, not empty 'int foo()' -KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) - # Prohibit date/time macros, which would make the build non-deterministic KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) @@ -1026,14 +1021,13 @@ cmd_link-vmlinux = \ $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE -ifdef CONFIG_HEADERS_CHECK - $(Q)$(MAKE) -f $(srctree)/Makefile headers_check -endif ifdef CONFIG_GDB_SCRIPTS $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) endif +$(call if_changed,link-vmlinux) +targets := vmlinux + # Build samples along the rest of the kernel. This needs headers_install. ifdef CONFIG_SAMPLES vmlinux-dirs += samples @@ -1051,7 +1045,7 @@ $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; # Error messages still appears in the original language PHONY += $(vmlinux-dirs) -$(vmlinux-dirs): prepare scripts +$(vmlinux-dirs): prepare $(Q)$(MAKE) $(build)=$@ need-builtin=1 define filechk_kernel.release @@ -1066,7 +1060,7 @@ include/config/kernel.release: $(srctree)/Makefile FORCE # Carefully list dependencies so we do not try to build scripts twice # in parallel PHONY += scripts -scripts: scripts_basic scripts_dtc asm-generic gcc-plugins $(autoksyms_h) +scripts: scripts_basic scripts_dtc $(Q)$(MAKE) $(build)=$(@) # Things we need to do before we recursively start building the kernel @@ -1099,22 +1093,23 @@ prepare2: prepare3 outputmakefile asm-generic prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h $(cmd_crmodverdir) -archprepare: archheaders archscripts prepare1 scripts_basic +archprepare: archheaders archscripts prepare1 scripts -prepare0: archprepare gcc-plugins +prepare0: archprepare + $(Q)$(MAKE) $(build)=scripts/mod $(Q)$(MAKE) $(build)=. # All the preparing.. prepare: prepare0 prepare-objtool # 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) -f $(srctree)/scripts/Makefile.asm-generic \ - src=asm obj=arch/$(SRCARCH)/include/generated/asm + $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm uapi-asm-generic: - $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ - src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm + $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm PHONY += prepare-objtool prepare-objtool: $(objtool_target) @@ -1199,6 +1194,10 @@ headers_check: headers_install $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 +ifdef CONFIG_HEADERS_CHECK +all: headers_check +endif + # --------------------------------------------------------------------------- # Kernel selftest @@ -1283,7 +1282,7 @@ modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) # Target to prepare building external modules PHONY += modules_prepare -modules_prepare: prepare scripts +modules_prepare: prepare # Target to install modules PHONY += modules_install @@ -1551,9 +1550,6 @@ else # KBUILD_EXTMOD # We are always building modules KBUILD_MODULES := 1 -PHONY += crmodverdir -crmodverdir: - $(cmd_crmodverdir) PHONY += $(objtree)/Module.symvers $(objtree)/Module.symvers: @@ -1565,7 +1561,7 @@ $(objtree)/Module.symvers: module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) PHONY += $(module-dirs) modules -$(module-dirs): crmodverdir $(objtree)/Module.symvers +$(module-dirs): prepare $(objtree)/Module.symvers $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) modules: $(module-dirs) @@ -1604,10 +1600,9 @@ help: @echo ' clean - remove generated files in module directory only' @echo '' -# Dummies... -PHONY += prepare scripts -prepare: ; -scripts: ; +PHONY += prepare +prepare: + $(cmd_crmodverdir) endif # KBUILD_EXTMOD clean: $(clean-dirs) @@ -1712,36 +1707,33 @@ else target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) endif -%.s: %.c prepare scripts FORCE +%.s: %.c prepare FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.i: %.c prepare scripts FORCE +%.i: %.c prepare FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.o: %.c prepare scripts FORCE +%.o: %.c prepare FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.lst: %.c prepare scripts FORCE +%.lst: %.c prepare FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.s: %.S prepare scripts FORCE +%.s: %.S prepare FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.o: %.S prepare scripts FORCE +%.o: %.S prepare FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.symtypes: %.c prepare scripts FORCE +%.symtypes: %.c prepare FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.ll: %.c prepare scripts FORCE +%.ll: %.c prepare FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) # Modules -/: prepare scripts FORCE - $(cmd_crmodverdir) +/: prepare FORCE $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ $(build)=$(build-dir) # Make sure the latest headers are built for Documentation Documentation/ samples/: headers_install -%/: prepare scripts FORCE - $(cmd_crmodverdir) +%/: prepare FORCE $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ $(build)=$(build-dir) -%.ko: prepare scripts FORCE - $(cmd_crmodverdir) +%.ko: prepare FORCE $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ $(build)=$(build-dir) $(@:.ko=.o) $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost @@ -1765,13 +1757,12 @@ quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) -# read all saved command lines -cmd_files := $(wildcard .*.cmd) +# read saved command lines for existing targets +existing-targets := $(wildcard $(sort $(targets))) -ifneq ($(cmd_files),) - $(cmd_files): ; # Do not try to update included dependency files - include $(cmd_files) -endif +cmd_files := $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) +$(cmd_files): ; # Do not try to update included dependency files +-include $(cmd_files) endif # ifeq ($(config-targets),1) endif # ifeq ($(mixed-targets),1) |