diff options
Diffstat (limited to 'scripts/Makefile.build')
-rw-r--r-- | scripts/Makefile.build | 353 |
1 files changed, 169 insertions, 184 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 2e8810b7e5ed..dae447a1ad30 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -5,8 +5,8 @@ src := $(obj) -PHONY := __build -__build: +PHONY := $(obj)/ +$(obj)/: # Init all relevant variables used in kbuild files so # 1) they have correct type @@ -15,7 +15,6 @@ obj-y := obj-m := lib-y := lib-m := -always := always-y := always-m := targets := @@ -27,6 +26,7 @@ EXTRA_CPPFLAGS := EXTRA_LDFLAGS := asflags-y := ccflags-y := +rustflags-y := cppflags-y := ldflags-y := @@ -36,24 +36,23 @@ subdir-ccflags-y := # Read auto.conf if it exists, otherwise ignore -include include/config/auto.conf -include scripts/Kbuild.include - -# The filename Kbuild has precedence over Makefile -kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) -kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile) +include $(srctree)/scripts/Kbuild.include +include $(srctree)/scripts/Makefile.compiler include $(kbuild-file) +include $(srctree)/scripts/Makefile.lib -include scripts/Makefile.lib - -# Do not include host rules unless needed -ifneq ($(hostprogs)$(hostcxxlibs-y)$(hostcxxlibs-m),) -include scripts/Makefile.host +# Do not include hostprogs rules unless needed. +# $(sort ...) is used here to remove duplicated words and excessive spaces. +hostprogs := $(sort $(hostprogs)) +ifneq ($(hostprogs),) +include $(srctree)/scripts/Makefile.host endif # Do not include userprogs rules unless needed. +# $(sort ...) is used here to remove duplicated words and excessive spaces. userprogs := $(sort $(userprogs)) ifneq ($(userprogs),) -include scripts/Makefile.userprogs +include $(srctree)/scripts/Makefile.userprogs endif ifndef obj @@ -83,7 +82,8 @@ ifdef need-builtin targets-for-builtin += $(obj)/built-in.a endif -targets-for-modules := $(patsubst %.o, %.mod, $(filter %.o, $(obj-m))) +targets-for-modules := $(foreach x, o mod, \ + $(patsubst %.o, %.$x, $(filter %.o, $(obj-m)))) ifdef need-modorder targets-for-modules += $(obj)/modules.order @@ -101,14 +101,16 @@ else ifeq ($(KBUILD_CHECKSRC),2) endif ifneq ($(KBUILD_EXTRA_WARN),) - cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $< + cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $(KDOCFLAGS) \ + $(if $(findstring 2, $(KBUILD_EXTRA_WARN)), -Wall) \ + $< endif # Compile C sources (.c) # --------------------------------------------------------------------------- quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ - cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS), $(c_flags)) $(DISABLE_LTO) -fverbose-asm -S -o $@ $< + cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS) $(CC_FLAGS_LTO), $(c_flags)) -fverbose-asm -S -o $@ $< $(obj)/%.s: $(src)/%.c FORCE $(call if_changed_dep,cc_s_c) @@ -119,18 +121,16 @@ cmd_cpp_i_c = $(CPP) $(c_flags) -o $@ $< $(obj)/%.i: $(src)/%.c FORCE $(call if_changed_dep,cpp_i_c) +genksyms = scripts/genksyms/genksyms \ + $(if $(1), -T $(2)) \ + $(if $(KBUILD_PRESERVE), -p) \ + -r $(or $(wildcard $(2:.symtypes=.symref)), /dev/null) + # These mirror gensymtypes_S and co below, keep them in synch. -cmd_gensymtypes_c = \ - $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ - scripts/genksyms/genksyms $(if $(1), -T $(2)) \ - $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ - $(if $(KBUILD_PRESERVE),-p) \ - -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) +cmd_gensymtypes_c = $(CPP) -D__GENKSYMS__ $(c_flags) $< | $(genksyms) quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ -cmd_cc_symtypes_c = \ - $(call cmd_gensymtypes_c,true,$@) >/dev/null; \ - test -s $@ || rm -f $@ + cmd_cc_symtypes_c = $(call cmd_gensymtypes_c,true,$@) >/dev/null $(obj)/%.symtypes : $(src)/%.c FORCE $(call cmd,cc_symtypes_c) @@ -138,7 +138,7 @@ $(obj)/%.symtypes : $(src)/%.c FORCE # LLVM assembly # Generate .ll files from .c quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@ - cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -o $@ $< + cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -fno-discard-value-names -o $@ $< $(obj)/%.ll: $(src)/%.c FORCE $(call if_changed_dep,cc_ll_c) @@ -147,36 +147,40 @@ $(obj)/%.ll: $(src)/%.c FORCE # The C file is compiled and updated dependency information is generated. # (See cmd_cc_o_c + relevant part of rule_cc_o_c) +is-single-obj-m = $(and $(part-of-module),$(filter $@, $(obj-m)),y) + +# When a module consists of a single object, there is no reason to keep LLVM IR. +# Make $(LD) covert LLVM IR to ELF here. +ifdef CONFIG_LTO_CLANG +cmd_ld_single_m = $(if $(is-single-obj-m), ; $(LD) $(ld_flags) -r -o $(tmp-target) $@; mv $(tmp-target) $@) +endif + quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ - cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< + cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< \ + $(cmd_ld_single_m) \ + $(cmd_objtool) ifdef CONFIG_MODVERSIONS # When module versioning is enabled the following steps are executed: # o compile a <file>.o from <file>.c -# o if <file>.o doesn't contain a __ksymtab version, i.e. does +# o if <file>.o doesn't contain a __export_symbol_*, i.e. does # not export symbols, it's done. # o otherwise, we calculate symbol versions using the good old -# genksyms on the preprocessed source and postprocess them in a way -# that they are usable as a linker script -# o generate .tmp_<file>.o from <file>.o using the linker to -# replace the unresolved symbols __crc_exported_symbol with -# the actual value of the checksum generated by genksyms -# o remove .tmp_<file>.o to <file>.o - -cmd_modversions_c = \ - if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \ - $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ - > $(@D)/.tmp_$(@F:.o=.ver); \ - \ - $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \ - -T $(@D)/.tmp_$(@F:.o=.ver); \ - mv -f $(@D)/.tmp_$(@F) $@; \ - rm -f $(@D)/.tmp_$(@F:.o=.ver); \ +# genksyms on the preprocessed source and dump them into the .cmd file. +# o modpost will extract versions from that file and create *.c files that will +# be compiled and linked to the kernel and/or modules. + +gen_symversions = \ + if $(NM) $@ 2>/dev/null | grep -q ' __export_symbol_'; then \ + $(call cmd_gensymtypes_$(1),$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ + >> $(dot-target).cmd; \ fi + +cmd_gen_symversions_c = $(call gen_symversions,c) + endif -ifdef CONFIG_FTRACE_MCOUNT_RECORD -ifndef CC_USING_RECORD_MCOUNT +ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT # compiler will not generate __mcount_loc use recordmcount or recordmcount.pl ifdef BUILD_C_RECORDMCOUNT ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") @@ -203,89 +207,48 @@ recordmcount_source := $(srctree)/scripts/recordmcount.pl endif # BUILD_C_RECORDMCOUNT cmd_record_mcount = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)), \ $(sub_cmd_record_mcount)) -endif # CC_USING_RECORD_MCOUNT -endif # CONFIG_FTRACE_MCOUNT_RECORD - -ifdef CONFIG_STACK_VALIDATION -ifneq ($(SKIP_STACK_VALIDATION),1) - -__objtool_obj := $(objtree)/tools/objtool/objtool - -objtool_args = $(if $(CONFIG_UNWINDER_ORC),orc generate,check) - -objtool_args += $(if $(part-of-module), --module,) - -ifndef CONFIG_FRAME_POINTER -objtool_args += --no-fp -endif -ifdef CONFIG_GCOV_KERNEL -objtool_args += --no-unreachable -endif -ifdef CONFIG_RETPOLINE - objtool_args += --retpoline -endif -ifdef CONFIG_X86_SMAP - objtool_args += --uaccess -endif +endif # CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory # 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file # 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file -cmd_objtool = $(if $(patsubst y%,, \ - $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ - $(__objtool_obj) $(objtool_args) $@) -objtool_obj = $(if $(patsubst y%,, \ - $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ - $(__objtool_obj)) - -endif # SKIP_STACK_VALIDATION -endif # CONFIG_STACK_VALIDATION - -# Rebuild all objects when objtool changes, or is enabled/disabled. -objtool_dep = $(objtool_obj) \ - $(wildcard include/config/orc/unwinder.h \ - include/config/stack/validation.h) - -ifdef CONFIG_TRIM_UNUSED_KSYMS -cmd_gen_ksymdeps = \ - $(CONFIG_SHELL) $(srctree)/scripts/gen_ksymdeps.sh $@ >> $(dot-target).cmd + +is-standard-object = $(if $(filter-out y%, $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n),y) + +$(obj)/%.o: objtool-enabled = $(if $(is-standard-object),$(if $(delay-objtool),$(is-single-obj-m),y)) + +ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),) +cmd_warn_shared_object = $(if $(word 2, $(modname-multi)),$(warning $(kbuild-file): $*.o is added to multiple modules: $(modname-multi))) endif define rule_cc_o_c - $(call cmd,checksrc) $(call cmd_and_fixdep,cc_o_c) - $(call cmd,gen_ksymdeps) + $(call cmd,checksrc) $(call cmd,checkdoc) - $(call cmd,objtool) - $(call cmd,modversions_c) + $(call cmd,gen_objtooldep) + $(call cmd,gen_symversions_c) $(call cmd,record_mcount) + $(call cmd,warn_shared_object) endef define rule_as_o_S $(call cmd_and_fixdep,as_o_S) - $(call cmd,gen_ksymdeps) - $(call cmd,objtool) - $(call cmd,modversions_S) + $(call cmd,gen_objtooldep) + $(call cmd,gen_symversions_S) + $(call cmd,warn_shared_object) endef -# List module undefined symbols (or empty line if not enabled) -ifdef CONFIG_TRIM_UNUSED_KSYMS -cmd_undef_syms = $(NM) $< | sed -n 's/^ *U //p' | xargs echo -else -cmd_undef_syms = echo -endif - # Built-in and composite module parts -$(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE - $(call cmd,force_checksrc) +$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE $(call if_changed_rule,cc_o_c) + $(call cmd,force_checksrc) -cmd_mod = { \ - echo $(if $($*-objs)$($*-y)$($*-m), $(addprefix $(obj)/, $($*-objs) $($*-y) $($*-m)), $(@:.mod=.o)); \ - $(cmd_undef_syms); \ - } > $@ +# To make this rule robust against "Argument list too long" error, +# ensure to add $(obj)/ prefix by a shell command. +cmd_mod = printf '%s\n' $(call real-search, $*.o, .o, -objs -y -m) | \ + $(AWK) '!x[$$0]++ { print("$(obj)/"$$0) }' > $@ -$(obj)/%.mod: $(obj)/%.o FORCE +$(obj)/%.mod: FORCE $(call if_changed,mod) quiet_cmd_cc_lst_c = MKLST $@ @@ -296,6 +259,59 @@ quiet_cmd_cc_lst_c = MKLST $@ $(obj)/%.lst: $(src)/%.c FORCE $(call if_changed_dep,cc_lst_c) +# Compile Rust sources (.rs) +# --------------------------------------------------------------------------- + +rust_allowed_features := new_uninit,offset_of + +# `--out-dir` is required to avoid temporaries being created by `rustc` in the +# current working directory, which may be not accessible in the out-of-tree +# modules case. +rust_common_cmd = \ + RUST_MODFILE=$(modfile) $(RUSTC_OR_CLIPPY) $(rust_flags) \ + -Zallow-features=$(rust_allowed_features) \ + -Zcrate-attr=no_std \ + -Zcrate-attr='feature($(rust_allowed_features))' \ + --extern alloc --extern kernel \ + --crate-type rlib -L $(objtree)/rust/ \ + --crate-name $(basename $(notdir $@)) \ + --sysroot=/dev/null \ + --out-dir $(dir $@) --emit=dep-info=$(depfile) + +# `--emit=obj`, `--emit=asm` and `--emit=llvm-ir` imply a single codegen unit +# will be used. We explicitly request `-Ccodegen-units=1` in any case, and +# the compiler shows a warning if it is not 1. However, if we ever stop +# requesting it explicitly and we start using some other `--emit` that does not +# imply it (and for which codegen is performed), then we would be out of sync, +# i.e. the outputs we would get for the different single targets (e.g. `.ll`) +# would not match each other. + +quiet_cmd_rustc_o_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@ + cmd_rustc_o_rs = $(rust_common_cmd) --emit=obj=$@ $< + +$(obj)/%.o: $(src)/%.rs FORCE + $(call if_changed_dep,rustc_o_rs) + +quiet_cmd_rustc_rsi_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@ + cmd_rustc_rsi_rs = \ + $(rust_common_cmd) -Zunpretty=expanded $< >$@; \ + command -v $(RUSTFMT) >/dev/null && $(RUSTFMT) $@ + +$(obj)/%.rsi: $(src)/%.rs FORCE + $(call if_changed_dep,rustc_rsi_rs) + +quiet_cmd_rustc_s_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@ + cmd_rustc_s_rs = $(rust_common_cmd) --emit=asm=$@ $< + +$(obj)/%.s: $(src)/%.rs FORCE + $(call if_changed_dep,rustc_s_rs) + +quiet_cmd_rustc_ll_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@ + cmd_rustc_ll_rs = $(rust_common_cmd) --emit=llvm-ir=$@ $< + +$(obj)/%.ll: $(src)/%.rs FORCE + $(call if_changed_dep,rustc_ll_rs) + # Compile assembler sources (.S) # --------------------------------------------------------------------------- @@ -313,19 +329,11 @@ $(obj)/%.lst: $(src)/%.c FORCE cmd_gensymtypes_S = \ { echo "\#include <linux/kernel.h>" ; \ echo "\#include <asm/asm-prototypes.h>" ; \ - $(CPP) $(a_flags) $< | \ - grep "\<___EXPORT_SYMBOL\>" | \ - sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ; } | \ - $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | \ - scripts/genksyms/genksyms $(if $(1), -T $(2)) \ - $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ - $(if $(KBUILD_PRESERVE),-p) \ - -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) + $(NM) $@ | sed -n 's/.* __export_symbol_\(.*\)/EXPORT_SYMBOL(\1);/p' ; } | \ + $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | $(genksyms) quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@ -cmd_cc_symtypes_S = \ - $(call cmd_gensymtypes_S,true,$@) >/dev/null; \ - test -s $@ || rm -f $@ + cmd_cc_symtypes_S = $(call cmd_gensymtypes_S,true,$@) >/dev/null $(obj)/%.symtypes : $(src)/%.S FORCE $(call cmd,cc_symtypes_S) @@ -338,31 +346,23 @@ $(obj)/%.s: $(src)/%.S FORCE $(call if_changed_dep,cpp_s_S) quiet_cmd_as_o_S = AS $(quiet_modtag) $@ - cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< + cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< $(cmd_objtool) ifdef CONFIG_ASM_MODVERSIONS # versioning matches the C process described above, with difference that # we parse asm-prototypes.h C header to get function definitions. -cmd_modversions_S = \ - if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \ - $(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ - > $(@D)/.tmp_$(@F:.o=.ver); \ - \ - $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \ - -T $(@D)/.tmp_$(@F:.o=.ver); \ - mv -f $(@D)/.tmp_$(@F) $@; \ - rm -f $(@D)/.tmp_$(@F:.o=.ver); \ - fi +cmd_gen_symversions_S = $(call gen_symversions,S) + endif -$(obj)/%.o: $(src)/%.S $(objtool_dep) FORCE +$(obj)/%.o: $(src)/%.S FORCE $(call if_changed_rule,as_o_S) targets += $(filter-out $(subdir-builtin), $(real-obj-y)) targets += $(filter-out $(subdir-modorder), $(real-obj-m)) -targets += $(lib-y) $(always-y) $(MAKECMDGOALS) +targets += $(real-dtb-y) $(lib-y) $(always-y) # Linker scripts preprocessor (.lds.S -> .lds) # --------------------------------------------------------------------------- @@ -392,9 +392,13 @@ $(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ; # # Rule to compile a set of .o files into one .a file (without symbol table) # +# To make this rule robust against "Argument list too long" error, +# remove $(obj)/ prefix, and restore it by a shell command. quiet_cmd_ar_builtin = AR $@ - cmd_ar_builtin = rm -f $@; $(AR) cDPrST $@ $(real-prereqs) + cmd_ar_builtin = rm -f $@; \ + $(if $(real-prereqs), printf "$(obj)/%s " $(patsubst $(obj)/%,%,$(real-prereqs)) | xargs) \ + $(AR) cDPrST $@ $(obj)/built-in.a: $(real-obj-y) FORCE $(call if_changed,ar_builtin) @@ -408,8 +412,8 @@ $(obj)/built-in.a: $(real-obj-y) FORCE # modules.order unless contained modules are updated. cmd_modules_order = { $(foreach m, $(real-prereqs), \ - $(if $(filter %/modules.order, $m), cat $m, echo $(patsubst %.o,%.ko,$m));) :; } \ - | $(AWK) '!x[$$0]++' - > $@ + $(if $(filter %/modules.order, $m), cat $m, echo $m);) :; } \ + > $@ $(obj)/modules.order: $(obj-m) FORCE $(call if_changed,modules_order) @@ -417,22 +421,23 @@ $(obj)/modules.order: $(obj-m) FORCE # # Rule to compile a set of .o files into one .a file (with symbol table) # + $(obj)/lib.a: $(lib-y) FORCE $(call if_changed,ar) -# NOTE: -# Do not replace $(filter %.o,^) with $(real-prereqs). When a single object -# module is turned into a multi object module, $^ will contain header file -# dependencies recorded in the .*.cmd file. -quiet_cmd_link_multi-m = LD [M] $@ - cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^) +quiet_cmd_ld_multi_m = LD [M] $@ + cmd_ld_multi_m = $(LD) $(ld_flags) -r -o $@ @$< $(cmd_objtool) -$(multi-used-m): FORCE - $(call if_changed,link_multi-m) -$(call multi_depend, $(multi-used-m), .o, -objs -y -m) +define rule_ld_multi_m + $(call cmd_and_savecmd,ld_multi_m) + $(call cmd,gen_objtooldep) +endef -targets += $(multi-used-m) -targets := $(filter-out $(PHONY), $(targets)) +$(multi-obj-m): objtool-enabled := $(delay-objtool) +$(multi-obj-m): part-of-module := y +$(multi-obj-m): %.o: %.mod FORCE + $(call if_changed_rule,ld_multi_m) +$(call multi_depend, $(multi-obj-m), .o, -objs -y -m) # Add intermediate targets: # When building objects with specific suffix patterns, add intermediate @@ -442,62 +447,41 @@ intermediate_targets = $(foreach sfx, $(2), \ $(filter %$(strip $(1)), $(targets)))) # %.asn1.o <- %.asn1.[ch] <- %.asn1 # %.dtb.o <- %.dtb.S <- %.dtb <- %.dts +# %.dtbo.o <- %.dtbo.S <- %.dtbo <- %.dtso # %.lex.o <- %.lex.c <- %.l # %.tab.o <- %.tab.[ch] <- %.y targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \ $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \ + $(call intermediate_targets, .dtbo.o, .dtbo.S .dtbo) \ $(call intermediate_targets, .lex.o, .lex.c) \ $(call intermediate_targets, .tab.o, .tab.c .tab.h) # Build # --------------------------------------------------------------------------- -ifdef single-build - -KBUILD_SINGLE_TARGETS := $(filter $(obj)/%, $(KBUILD_SINGLE_TARGETS)) - -curdir-single := $(sort $(foreach x, $(KBUILD_SINGLE_TARGETS), \ - $(if $(filter $(x) $(basename $(x)).o, $(targets)), $(x)))) - -# Handle single targets without any rule: show "Nothing to be done for ..." or -# "No rule to make target ..." depending on whether the target exists. -unknown-single := $(filter-out $(addsuffix /%, $(subdir-ym)), \ - $(filter-out $(curdir-single), $(KBUILD_SINGLE_TARGETS))) - -single-subdirs := $(foreach d, $(subdir-ym), \ - $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) - -__build: $(curdir-single) $(single-subdirs) -ifneq ($(unknown-single),) - $(Q)$(MAKE) -f /dev/null $(unknown-single) -endif +$(obj)/: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \ + $(if $(KBUILD_MODULES), $(targets-for-modules)) \ + $(subdir-ym) $(always-y) @: -ifeq ($(curdir-single),) -# Nothing to do in this directory. Do not include any .*.cmd file for speed-up -targets := -else -targets += $(curdir-single) -endif +# Single targets +# --------------------------------------------------------------------------- -else +single-subdirs := $(foreach d, $(subdir-ym), $(if $(filter $d/%, $(MAKECMDGOALS)), $d)) +single-subdir-goals := $(filter $(addsuffix /%, $(single-subdirs)), $(MAKECMDGOALS)) -__build: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \ - $(if $(KBUILD_MODULES), $(targets-for-modules)) \ - $(subdir-ym) $(always-y) +$(single-subdir-goals): $(single-subdirs) @: -endif - # Descending # --------------------------------------------------------------------------- PHONY += $(subdir-ym) $(subdir-ym): $(Q)$(MAKE) $(build)=$@ \ - $(if $(filter $@/, $(KBUILD_SINGLE_TARGETS)),single-build=) \ need-builtin=$(if $(filter $@/built-in.a, $(subdir-builtin)),1) \ - need-modorder=$(if $(filter $@/modules.order, $(subdir-modorder)),1) + need-modorder=$(if $(filter $@/modules.order, $(subdir-modorder)),1) \ + $(filter $@/%, $(single-subdir-goals)) # Add FORCE to the prequisites of a target to force it to be always rebuilt. # --------------------------------------------------------------------------- @@ -506,6 +490,9 @@ PHONY += FORCE FORCE: +targets += $(filter-out $(single-subdir-goals), $(MAKECMDGOALS)) +targets := $(filter-out $(PHONY), $(targets)) + # Read all saved command lines and dependencies for the $(targets) we # may be building above, using $(if_changed{,_dep}). As an # optimization, we don't need to read them if the target does not @@ -515,15 +502,13 @@ existing-targets := $(wildcard $(sort $(targets))) -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) -ifdef building_out_of_srctree # Create directories for object files if they do not exist -obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets)))) +obj-dirs := $(sort $(patsubst %/,%, $(dir $(targets)))) # If targets exist, their directories apparently exist. Skip mkdir. existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets)))) obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs))) ifneq ($(obj-dirs),) $(shell mkdir -p $(obj-dirs)) endif -endif .PHONY: $(PHONY) |