diff options
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 296 |
1 files changed, 151 insertions, 145 deletions
@@ -230,6 +230,8 @@ endif export KBUILD_CHECKSRC KBUILD_EXTMOD +extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) + ifeq ($(abs_srctree),$(abs_objtree)) # building in the source tree srctree := . @@ -271,52 +273,62 @@ no-dot-config-targets := $(clean-targets) \ %asm-generic kernelversion %src-pkg no-sync-config-targets := $(no-dot-config-targets) install %install \ kernelrelease +single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ -config-targets := 0 -mixed-targets := 0 -dot-config := 1 -may-sync-config := 1 +config-build := +mixed-build := +need-config := 1 +may-sync-config := 1 +single-build := ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) - dot-config := 0 + need-config := endif endif ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) - may-sync-config := 0 + may-sync-config := endif endif ifneq ($(KBUILD_EXTMOD),) - may-sync-config := 0 + may-sync-config := endif ifeq ($(KBUILD_EXTMOD),) ifneq ($(filter config %config,$(MAKECMDGOALS)),) - config-targets := 1 + config-build := 1 ifneq ($(words $(MAKECMDGOALS)),1) - mixed-targets := 1 + mixed-build := 1 endif endif endif +# We cannot build single targets and the others at the same time +ifneq ($(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-targets := 1 + 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-targets := 1 + mixed-build := 1 endif endif -ifeq ($(mixed-targets),1) +ifdef mixed-build # =========================================================================== # We're called with mixed targets (*config and build targets). # Handle them one by one. @@ -332,7 +344,7 @@ __build_one_by_one: $(MAKE) -f $(srctree)/Makefile $$i; \ done -else +else # !mixed-build include scripts/Kbuild.include @@ -392,9 +404,7 @@ KCONFIG_CONFIG ?= .config export KCONFIG_CONFIG # SHELL used by kbuild -CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ - else if [ -x /bin/bash ]; then echo /bin/bash; \ - else echo sh; fi ; fi) +CONFIG_SHELL := sh HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) @@ -431,6 +441,7 @@ PYTHON = python PYTHON2 = python2 PYTHON3 = python3 CHECK = sparse +BASH = bash CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) @@ -470,12 +481,13 @@ KBUILD_AFLAGS_KERNEL := KBUILD_CFLAGS_KERNEL := KBUILD_AFLAGS_MODULE := -DMODULE KBUILD_CFLAGS_MODULE := -DMODULE -KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds +KBUILD_LDFLAGS_MODULE := +export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds KBUILD_LDFLAGS := GCC_PLUGINS_CFLAGS := CLANG_FLAGS := -export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC +export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE PAHOLE LEX YACC AWK INSTALLKERNEL export PERL PYTHON PYTHON2 PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE @@ -506,6 +518,7 @@ scripts_basic: $(Q)rm -f .tmp_quiet_recordmcount PHONY += outputmakefile +# 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. @@ -513,6 +526,15 @@ PHONY += outputmakefile # ignore whole output directory outputmakefile: ifdef building_out_of_srctree + $(Q)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 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) $(Q)test -e .gitignore || \ @@ -544,7 +566,7 @@ endif # and from include/config/auto.conf.cmd to detect the compiler upgrade. CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) -ifeq ($(config-targets),1) +ifdef config-build # =========================================================================== # *config targets only - make sure prerequisites are updated, and descend # in scripts/kconfig to make the *config target @@ -555,13 +577,13 @@ ifeq ($(config-targets),1) include arch/$(SRCARCH)/Makefile export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT -config: scripts_basic outputmakefile FORCE +config: outputmakefile scripts_basic FORCE $(Q)$(MAKE) $(build)=scripts/kconfig $@ -%config: scripts_basic outputmakefile FORCE +%config: outputmakefile scripts_basic FORCE $(Q)$(MAKE) $(build)=scripts/kconfig $@ -else +else #!config-build # =========================================================================== # Build targets only - this includes vmlinux, arch specific targets, clean # targets and others. In general all targets except *config targets. @@ -604,7 +626,7 @@ endif export KBUILD_MODULES KBUILD_BUILTIN -ifeq ($(dot-config),1) +ifdef need-config include include/config/auto.conf endif @@ -645,15 +667,10 @@ RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc export RETPOLINE_CFLAGS export RETPOLINE_VDSO_CFLAGS -# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default -# values of the respective KBUILD_* variables -ARCH_CPPFLAGS := -ARCH_AFLAGS := -ARCH_CFLAGS := include arch/$(SRCARCH)/Makefile -ifeq ($(dot-config),1) -ifeq ($(may-sync-config),1) +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. @@ -676,7 +693,7 @@ $(KCONFIG_CONFIG): # The syncconfig should be executed only once to make all the targets. %/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig -else +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 @@ -692,7 +709,7 @@ include/config/auto.conf: /bin/false) endif # may-sync-config -endif # $(dot-config) +endif # need-config KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) @@ -700,10 +717,12 @@ 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_SIZE -KBUILD_CFLAGS += -Os -else -KBUILD_CFLAGS += -O2 +ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE +KBUILD_CFLAGS += -O2 +else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3 +KBUILD_CFLAGS += -O3 +else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE +KBUILD_CFLAGS += -Os endif ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED @@ -751,6 +770,11 @@ else # These warnings generated too much noise in a regular build. # Use make W=1 to enable them (see scripts/Makefile.extrawarn) KBUILD_CFLAGS += -Wno-unused-but-set-variable + +# Warn about unmarked fall-throughs in switch statement. +# Disabled for clang while comment to attribute conversion happens and +# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed. +KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) endif KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) @@ -845,9 +869,6 @@ NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) # warn about C99 declaration after statement KBUILD_CFLAGS += -Wdeclaration-after-statement -# Warn about unmarked fall-throughs in switch statement. -KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,) - # Variable Length Arrays (VLAs) should not be used anywhere in the kernel KBUILD_CFLAGS += -Wvla @@ -900,11 +921,10 @@ include scripts/Makefile.kasan include scripts/Makefile.extrawarn include scripts/Makefile.ubsan -# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the -# last assignments -KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) -KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) -KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) +# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments +KBUILD_CPPFLAGS += $(KCPPFLAGS) +KBUILD_AFLAGS += $(KAFLAGS) +KBUILD_CFLAGS += $(KCFLAGS) KBUILD_LDFLAGS_MODULE += --build-id LDFLAGS_vmlinux += --build-id @@ -1007,7 +1027,7 @@ endif PHONY += prepare0 -export MODORDER := $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)modules.order +export MODORDER := $(extmod-prefix)modules.order ifeq ($(KBUILD_EXTMOD),) core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ @@ -1020,6 +1040,9 @@ vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ $(drivers-) $(net-) $(libs-) $(virt-)))) +build-dirs := $(vmlinux-dirs) +clean-dirs := $(vmlinux-alldirs) + init-y := $(patsubst %/, %/built-in.a, $(init-y)) core-y := $(patsubst %/, %/built-in.a, $(core-y)) drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) @@ -1042,7 +1065,7 @@ vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) # Recurse until adjust_autoksyms.sh is satisfied PHONY += autoksyms_recursive ifdef CONFIG_TRIM_UNUSED_KSYMS -autoksyms_recursive: $(vmlinux-deps) modules.order +autoksyms_recursive: descend modules.order $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ "$(MAKE) -f $(srctree)/Makefile vmlinux" endif @@ -1074,17 +1097,7 @@ targets := vmlinux # The actual objects are generated when descending, # make sure no implicit rule kicks in -$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; - -# Handle descending into subdirectories listed in $(vmlinux-dirs) -# 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 += $(vmlinux-dirs) -$(vmlinux-dirs): prepare - $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 +$(sort $(vmlinux-deps)): descend ; filechk_kernel.release = \ echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" @@ -1106,24 +1119,9 @@ scripts: scripts_basic scripts_dtc # archprepare is used in arch Makefiles and when processed asm symlink, # version.h and scripts_basic is processed / created. -PHONY += prepare archprepare prepare3 +PHONY += prepare archprepare -# prepare3 is used to check if we are building in a separate output directory, -# and if so do: -# 1) Check that make has not been executed in the kernel src $(srctree) -prepare3: include/config/kernel.release -ifdef building_out_of_srctree - @$(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 " $(srctree) is not clean, please run 'make ARCH=$(ARCH) mrproper'"; \ - echo >&2 " in the '$(srctree)' directory.";\ - /bin/false; \ - fi; -endif - -archprepare: archheaders archscripts scripts prepare3 outputmakefile \ +archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h prepare0: archprepare @@ -1248,7 +1246,7 @@ 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 + $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig # --------------------------------------------------------------------------- # Devicetree files @@ -1259,11 +1257,11 @@ endif ifneq ($(dtstree),) -%.dtb: prepare3 scripts_dtc +%.dtb: include/config/kernel.release scripts_dtc $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ PHONY += dtbs dtbs_install dt_binding_check -dtbs dtbs_check: prepare3 scripts_dtc +dtbs dtbs_check: include/config/kernel.release scripts_dtc $(Q)$(MAKE) $(build)=$(dtstree) dtbs_check: export CHECK_DTBS=1 @@ -1302,17 +1300,16 @@ all: modules PHONY += modules 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.order: $(vmlinux-dirs) - $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@ +modules.order: descend + $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ -modbuiltin-dirs := $(addprefix _modbuiltin_, $(vmlinux-dirs)) +modbuiltin-dirs := $(addprefix _modbuiltin_, $(build-dirs)) modules.builtin: $(modbuiltin-dirs) - $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@ + $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@ PHONY += $(modbuiltin-dirs) # tristate.conf is not included from this Makefile. Add it as a prerequisite @@ -1385,12 +1382,14 @@ CLEAN_FILES += modules.builtin.modinfo # Directories & files removed with 'make mrproper' MRPROPER_DIRS += include/config include/generated \ - arch/$(SRCARCH)/include/generated .tmp_objdiff + arch/$(SRCARCH)/include/generated .tmp_objdiff \ + debian/ snap/ tar-install/ MRPROPER_FILES += .config .config.old .version \ Module.symvers \ signing_key.pem signing_key.priv signing_key.x509 \ x509.genkey extra_certificates signing_key.x509.keyid \ - signing_key.x509.signer vmlinux-gdb.py + signing_key.x509.signer vmlinux-gdb.py \ + *.spec # Directories & files removed with 'make distclean' DISTCLEAN_DIRS += @@ -1400,11 +1399,8 @@ DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS # clean: rm-dirs := $(CLEAN_DIRS) clean: rm-files := $(CLEAN_FILES) -clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs)) -PHONY += $(clean-dirs) clean archclean vmlinuxclean -$(clean-dirs): - $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) +PHONY += archclean vmlinuxclean vmlinuxclean: $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean @@ -1445,13 +1441,11 @@ distclean: mrproper # Packaging of the kernel to various formats # --------------------------------------------------------------------------- -package-dir := scripts/package %src-pkg: FORCE - $(Q)$(MAKE) $(build)=$(package-dir) $@ + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ %pkg: include/config/kernel.release FORCE - $(Q)$(MAKE) $(build)=$(package-dir) $@ - + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ # Brief documentation of the typical targets used # --------------------------------------------------------------------------- @@ -1525,7 +1519,7 @@ help: @echo ' or "cd tools; make help"' @echo '' @echo 'Kernel packaging:' - @$(MAKE) $(build)=$(package-dir) help + @$(MAKE) -f $(srctree)/scripts/Makefile.package help @echo '' @echo 'Documentation targets:' @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp @@ -1550,7 +1544,7 @@ help: @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' @echo ' make C=2 [targets] Force check of all c source with $$CHECK' @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' - @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' + @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' @@ -1579,7 +1573,7 @@ $(help-board-dirs): help-%: DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ linkcheckdocs dochelp refcheckdocs PHONY += $(DOC_TARGETS) -$(DOC_TARGETS): scripts_basic FORCE +$(DOC_TARGETS): $(Q)$(MAKE) $(build)=Documentation $@ # Misc @@ -1624,13 +1618,9 @@ $(objtree)/Module.symvers: echo " is missing; modules will have no dependencies and modversions."; \ echo ) -module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) -PHONY += $(module-dirs) modules -$(module-dirs): prepare $(objtree)/Module.symvers - $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) need-modorder=1 - -modules: $(module-dirs) - @$(kecho) ' Building modules, stage 2.'; +build-dirs := $(KBUILD_EXTMOD) +PHONY += modules +modules: descend $(objtree)/Module.symvers $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost PHONY += modules_install @@ -1646,14 +1636,13 @@ PHONY += _emodinst_post _emodinst_post: _emodinst_ $(call cmd,depmod) -clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) - -PHONY += $(clean-dirs) clean -$(clean-dirs): - $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) - +clean-dirs := $(KBUILD_EXTMOD) clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers +PHONY += / +/: + @echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.' + PHONY += help help: @echo ' Building external modules.' @@ -1667,6 +1656,21 @@ help: PHONY += prepare endif # KBUILD_EXTMOD +# Handle descending into subdirectories listed in $(build-dirs) +# 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 += descend $(build-dirs) +descend: $(build-dirs) +$(build-dirs): prepare + $(Q)$(MAKE) $(build)=$@ single-build=$(single-build) need-builtin=1 need-modorder=1 + +clean-dirs := $(addprefix _clean_, $(clean-dirs)) +PHONY += $(clean-dirs) clean +$(clean-dirs): + $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) + clean: $(clean-dirs) $(call cmd,rmdirs) $(call cmd,rmfiles) @@ -1688,7 +1692,7 @@ clean: $(clean-dirs) # Generate tags for editors # --------------------------------------------------------------------------- quiet_cmd_tags = GEN $@ - cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ + cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ tags TAGS cscope gtags: FORCE $(call cmd,tags) @@ -1709,7 +1713,7 @@ versioncheck: | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl coccicheck: - $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ + $(Q)$(BASH) $(srctree)/scripts/$@ namespacecheck: $(PERL) $(srctree)/scripts/namespace.pl @@ -1757,45 +1761,47 @@ tools/%: FORCE # Single targets # --------------------------------------------------------------------------- -# Single targets are compatible with: -# - build with mixed source and output -# - build with separate output dir 'make O=...' -# - external modules +# To build individual files in subdirectories, you can do like this: +# +# make foo/bar/baz.s # -# target-dir => where to store outputfile -# build-dir => directory in kernel source tree to use - -build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@ -build-dir = $(patsubst %/,%,$(dir $(build-target))) - -%.i: prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) -%.ll: prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) -%.lst: prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) -%.o: prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) -%.s: prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) -%.symtypes: prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) +# 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 + +single-all := $(filter $(single-targets), $(MAKECMDGOALS)) + +# .ko is special because modpost is needed +single-ko := $(sort $(filter %.ko, $(single-all))) +single-no-ko := $(sort $(patsubst %.ko,%.mod, $(single-all))) + +$(single-ko): single_modpost + @: +$(single-no-ko): descend + @: + ifeq ($(KBUILD_EXTMOD),) -# For the single build of an in-tree module, use a temporary file to avoid +# For the single build of in-tree modules, use a temporary file to avoid # the situation of modules_install installing an invalid modules.order. -%.ko: MODORDER := .modules.tmp +MODORDER := .modules.tmp endif -%.ko: prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(build-target:.ko=.mod) - $(Q)echo $(build-target) > $(MODORDER) + +PHONY += single_modpost +single_modpost: $(single-no-ko) + $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost -# Modules -PHONY += / -/: ./ +KBUILD_MODULES := 1 -%/: prepare FORCE - $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) need-modorder=1 +export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko)) + +single-build = $(if $(filter-out $@/, $(single-no-ko)),1) + +endif # FIXME Should go into a make.lib or something # =========================================================================== @@ -1816,9 +1822,9 @@ existing-targets := $(wildcard $(sort $(targets))) -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) -endif # ifeq ($(config-targets),1) -endif # ifeq ($(mixed-targets),1) -endif # need-sub-make +endif # config-targets +endif # mixed-build +endif # need-sub-make PHONY += FORCE FORCE: |