diff options
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 117 |
1 files changed, 66 insertions, 51 deletions
@@ -212,6 +212,13 @@ endif ifdef SUBDIRS $(warning ================= WARNING ================) $(warning 'SUBDIRS' will be removed after Linux 5.3) + $(warning ) + $(warning If you are building an individual subdirectory) + $(warning in the kernel tree, you can do like this:) + $(warning $$ make path/to/dir/you/want/to/build/) + $(warning (Do not forget the trailing slash)) + $(warning ) + $(warning If you are building an external module,) $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) $(warning ==========================================) KBUILD_EXTMOD ?= $(SUBDIRS) @@ -221,9 +228,12 @@ ifeq ("$(origin M)", "command line") KBUILD_EXTMOD := $(M) endif +export KBUILD_CHECKSRC KBUILD_EXTMOD + 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 @@ -231,22 +241,17 @@ else else srctree := $(abs_srctree) endif - - # TODO: - # KBUILD_SRC is only used to distinguish in-tree/out-of-tree build. - # Replace it with $(srctree) or something. - KBUILD_SRC := $(abs_srctree) + building_out_of_srctree := 1 endif -export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC +ifneq ($(KBUILD_ABS_SRCTREE),) +srctree := $(abs_srctree) +endif objtree := . -src := $(srctree) -obj := $(objtree) - VPATH := $(srctree) -export srctree objtree VPATH +export building_out_of_srctree srctree objtree VPATH # To make sure we do not include .config for any of the *config targets # catch them early, and hand them over to scripts/kconfig/Makefile @@ -262,7 +267,7 @@ old_version_h := include/linux/version.h clean-targets := %clean mrproper cleandocs no-dot-config-targets := $(clean-targets) \ cscope gtags TAGS tags help% %docs check% coccicheck \ - $(version_h) headers_% archheaders archscripts \ + $(version_h) headers headers_% archheaders archscripts \ %asm-generic kernelversion %src-pkg no-sync-config-targets := $(no-dot-config-targets) install %install \ kernelrelease @@ -449,7 +454,7 @@ USERINCLUDE := \ LINUXINCLUDE := \ -I$(srctree)/arch/$(SRCARCH)/include \ -I$(objtree)/arch/$(SRCARCH)/include/generated \ - $(if $(filter .,$(srctree)),,-I$(srctree)/include) \ + $(if $(building_out_of_srctree),-I$(srctree)/include) \ -I$(objtree)/include \ $(USERINCLUDE) @@ -510,7 +515,7 @@ PHONY += outputmakefile # At the same time when output Makefile generated, generate .gitignore to # ignore whole output directory outputmakefile: -ifneq ($(srctree),.) +ifdef building_out_of_srctree $(Q)ln -fsn $(srctree) source $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) $(Q)test -e .gitignore || \ @@ -527,7 +532,10 @@ endif ifneq ($(GCC_TOOLCHAIN),) CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) endif +ifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),) CLANG_FLAGS += -no-integrated-as +endif +CLANG_FLAGS += -Werror=unknown-warning-option KBUILD_CFLAGS += $(CLANG_FLAGS) KBUILD_AFLAGS += $(CLANG_FLAGS) export CLANG_FLAGS @@ -608,6 +616,7 @@ ifeq ($(KBUILD_EXTMOD),) init-y := init/ drivers-y := drivers/ sound/ drivers-$(CONFIG_SAMPLES) += samples/ +drivers-$(CONFIG_KERNEL_HEADER_TEST) += include/ net-y := net/ libs-y := lib/ core-y := usr/ @@ -1053,9 +1062,6 @@ vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE targets := vmlinux -# Some samples need headers_install. -samples: headers_install - # The actual objects are generated when descending, # make sure no implicit rule kicks in $(sort $(vmlinux-deps)): $(vmlinux-dirs) ; @@ -1096,12 +1102,12 @@ PHONY += prepare archprepare prepare1 prepare3 # and if so do: # 1) Check that make has not been executed in the kernel src $(srctree) prepare3: include/config/kernel.release -ifneq ($(srctree),.) +ifdef building_out_of_srctree @$(kecho) ' Using $(srctree) as source for kernel' $(Q)if [ -f $(srctree)/.config -o \ -d $(srctree)/include/config -o \ -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ - echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ + echo >&2 " $(srctree) is not clean, please run 'make ARCH=$(ARCH) mrproper'"; \ echo >&2 " in the '$(srctree)' directory.";\ /bin/false; \ fi; @@ -1181,39 +1187,44 @@ headerdep: #Default location for installed headers export INSTALL_HDR_PATH = $(objtree)/usr -# If we do an all arch process set dst to include/arch-$(SRCARCH) -hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) +quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include + cmd_headers_install = \ + mkdir -p $(INSTALL_HDR_PATH); \ + rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ + usr/include $(INSTALL_HDR_PATH) -PHONY += archheaders archscripts +PHONY += headers_install +headers_install: headers + $(call cmd,headers_install) -PHONY += __headers -__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts - $(Q)$(MAKE) $(build)=scripts build_unifdef +PHONY += archheaders archscripts -PHONY += headers_install_all -headers_install_all: - $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install +hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj -PHONY += headers_install -headers_install: __headers +PHONY += headers +headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ $(error Headers not exportable for the $(SRCARCH) architecture)) - $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include - $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) - -PHONY += headers_check_all -headers_check_all: headers_install_all - $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check + $(Q)$(MAKE) $(hdr-inst)=include/uapi + $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi PHONY += headers_check -headers_check: headers_install - $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 - $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 +headers_check: headers + $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 + $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi HDRCHECK=1 + +ifdef CONFIG_HEADERS_INSTALL +prepare: headers +endif ifdef CONFIG_HEADERS_CHECK all: headers_check endif +PHONY += scripts_unifdef +scripts_unifdef: scripts_basic + $(Q)$(MAKE) $(build)=scripts scripts/unifdef + # --------------------------------------------------------------------------- # Kernel selftest @@ -1283,18 +1294,24 @@ all: modules # using awk while concatenating to the final file. PHONY += modules -modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin - $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order +modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin @$(kecho) ' Building modules, stage 2.'; $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh -modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) - $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin +modules.order: $(vmlinux-dirs) + $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@ + +modbuiltin-dirs := $(addprefix _modbuiltin_, $(vmlinux-dirs)) -%/modules.builtin: include/config/auto.conf include/config/tristate.conf - $(Q)$(MAKE) $(modbuiltin)=$* +modules.builtin: $(modbuiltin-dirs) + $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@ +PHONY += $(modbuiltin-dirs) +# tristate.conf is not included from this Makefile. Add it as a prerequisite +# here to make it self-healing in case somebody accidentally removes it. +$(modbuiltin-dirs): include/config/tristate.conf + $(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@) # Target to prepare building external modules PHONY += modules_prepare @@ -1360,7 +1377,7 @@ CLEAN_DIRS += $(MODVERDIR) include/ksym CLEAN_FILES += modules.builtin.modinfo # Directories & files removed with 'make mrproper' -MRPROPER_DIRS += include/config usr/include include/generated \ +MRPROPER_DIRS += include/config include/generated \ arch/$(SRCARCH)/include/generated .tmp_objdiff MRPROPER_FILES += .config .config.old .version \ Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ @@ -1551,7 +1568,7 @@ $(DOC_TARGETS): scripts_basic FORCE # --------------------------------------------------------------------------- PHONY += scripts_gdb -scripts_gdb: prepare +scripts_gdb: prepare0 $(Q)$(MAKE) $(build)=scripts/gdb $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) @@ -1698,7 +1715,7 @@ CHECKSTACK_ARCH := $(ARCH) endif checkstack: $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ - $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) + $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) kernelrelease: @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" @@ -1717,11 +1734,11 @@ endif tools/: FORCE $(Q)mkdir -p $(objtree)/tools - $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ + $(Q)$(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 $(src)/tools/ $* + $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* # Single targets # --------------------------------------------------------------------------- @@ -1755,8 +1772,6 @@ build-dir = $(patsubst %/,%,$(dir $(build-target))) PHONY += / /: ./ -# Make sure the latest headers are built for Documentation -Documentation/ samples/: headers_install %/: prepare FORCE $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) |