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-rw-r--r--scripts/Makefile.build362
1 files changed, 207 insertions, 155 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index a0d5c6cca76d..52c08c4eb0b9 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -3,7 +3,7 @@
# Building
# ==========================================================================
-src := $(obj)
+src := $(srcroot)/$(obj)
PHONY := $(obj)/
$(obj)/:
@@ -20,10 +20,6 @@ always-m :=
targets :=
subdir-y :=
subdir-m :=
-EXTRA_AFLAGS :=
-EXTRA_CFLAGS :=
-EXTRA_CPPFLAGS :=
-EXTRA_LDFLAGS :=
asflags-y :=
ccflags-y :=
rustflags-y :=
@@ -34,25 +30,95 @@ subdir-asflags-y :=
subdir-ccflags-y :=
# Read auto.conf if it exists, otherwise ignore
--include include/config/auto.conf
+-include $(objtree)/include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
include $(srctree)/scripts/Makefile.compiler
include $(kbuild-file)
include $(srctree)/scripts/Makefile.lib
-# 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
+# flags that take effect in current and sub directories
+KBUILD_AFLAGS += $(subdir-asflags-y)
+KBUILD_CFLAGS += $(subdir-ccflags-y)
+KBUILD_RUSTFLAGS += $(subdir-rustflags-y)
+
+# Figure out what we need to build from the various variables
+# ===========================================================================
+
+# When an object is listed to be built compiled-in and modular,
+# only build the compiled-in version
+obj-m := $(filter-out $(obj-y),$(obj-m))
+
+# Libraries are always collected in one lib file.
+# Filter out objects already built-in
+lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
+
+# Subdirectories we need to descend into
+subdir-ym := $(sort $(subdir-y) $(subdir-m) \
+ $(patsubst %/,%, $(filter %/, $(obj-y) $(obj-m))))
+
+# Handle objects in subdirs:
+# - If we encounter foo/ in $(obj-y), replace it by foo/built-in.a and
+# foo/modules.order
+# - If we encounter foo/ in $(obj-m), replace it by foo/modules.order
+#
+# Generate modules.order to determine modorder. Unfortunately, we don't have
+# information about ordering between -y and -m subdirs. Just put -y's first.
+
+ifdef need-modorder
+obj-m := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m))
+else
+obj-m := $(filter-out %/, $(obj-m))
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 $(srctree)/scripts/Makefile.userprogs
+ifdef need-builtin
+obj-y := $(patsubst %/, %/built-in.a, $(obj-y))
+else
+obj-y := $(filter-out %/, $(obj-y))
+endif
+
+# Expand $(foo-objs) $(foo-y) etc. by replacing their individuals
+suffix-search = $(strip $(foreach s, $3, $($(1:%$(strip $2)=%$s))))
+# List composite targets that are constructed by combining other targets
+multi-search = $(sort $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $m)))
+# List primitive targets that are compiled from source files
+real-search = $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $(call suffix-search, $m, $2, $3), $m))
+
+# If $(foo-objs), $(foo-y), $(foo-m), or $(foo-) exists, foo.o is a composite object
+multi-obj-y := $(call multi-search, $(obj-y), .o, -objs -y)
+multi-obj-m := $(call multi-search, $(obj-m), .o, -objs -y -m)
+multi-obj-ym := $(multi-obj-y) $(multi-obj-m)
+
+# Replace multi-part objects by their individual parts,
+# including built-in.a from subdirectories
+real-obj-y := $(call real-search, $(obj-y), .o, -objs -y)
+real-obj-m := $(call real-search, $(obj-m), .o, -objs -y -m)
+
+always-y += $(always-m)
+
+# hostprogs-always-y += foo
+# ... is a shorthand for
+# hostprogs += foo
+# always-y += foo
+hostprogs += $(hostprogs-always-y) $(hostprogs-always-m)
+always-y += $(hostprogs-always-y) $(hostprogs-always-m)
+
+# userprogs-always-y is likewise.
+userprogs += $(userprogs-always-y) $(userprogs-always-m)
+always-y += $(userprogs-always-y) $(userprogs-always-m)
+
+# Add subdir path
+
+ifneq ($(obj),.)
+extra-y := $(addprefix $(obj)/, $(extra-y))
+always-y := $(addprefix $(obj)/, $(always-y))
+targets := $(addprefix $(obj)/, $(targets))
+obj-m := $(addprefix $(obj)/, $(obj-m))
+lib-y := $(addprefix $(obj)/, $(lib-y))
+real-obj-y := $(addprefix $(obj)/, $(real-obj-y))
+real-obj-m := $(addprefix $(obj)/, $(real-obj-m))
+multi-obj-m := $(addprefix $(obj)/, $(multi-obj-m))
+subdir-ym := $(addprefix $(obj)/, $(subdir-ym))
endif
ifndef obj
@@ -82,7 +148,7 @@ ifdef need-builtin
targets-for-builtin += $(obj)/built-in.a
endif
-targets-for-modules := $(foreach x, o mod $(if $(CONFIG_TRIM_UNUSED_KSYMS), usyms), \
+targets-for-modules := $(foreach x, o mod, \
$(patsubst %.o, %.$x, $(filter %.o, $(obj-m))))
ifdef need-modorder
@@ -101,7 +167,9 @@ else ifeq ($(KBUILD_CHECKSRC),2)
endif
ifneq ($(KBUILD_EXTRA_WARN),)
- cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $<
+ cmd_checkdoc = PYTHONDONTWRITEBYTECODE=1 $(PYTHON3) $(KERNELDOC) -none $(KDOCFLAGS) \
+ $(if $(findstring 2, $(KBUILD_EXTRA_WARN)), -Wall) \
+ $<
endif
# Compile C sources (.c)
@@ -110,35 +178,40 @@ endif
quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS) $(CC_FLAGS_LTO), $(c_flags)) -fverbose-asm -S -o $@ $<
-$(obj)/%.s: $(src)/%.c FORCE
+$(obj)/%.s: $(obj)/%.c FORCE
$(call if_changed_dep,cc_s_c)
quiet_cmd_cpp_i_c = CPP $(quiet_modtag) $@
cmd_cpp_i_c = $(CPP) $(c_flags) -o $@ $<
-$(obj)/%.i: $(src)/%.c FORCE
+$(obj)/%.i: $(obj)/%.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)
+getexportsymbols = $(NM) $@ | sed -n 's/.* __export_symbol_\(.*\)/$(1)/p'
-# These mirror gensymtypes_S and co below, keep them in synch.
-cmd_gensymtypes_c = $(CPP) -D__GENKSYMS__ $(c_flags) $< | $(genksyms)
+gendwarfksyms = $(objtree)/scripts/gendwarfksyms/gendwarfksyms \
+ $(if $(KBUILD_SYMTYPES), --symtypes $(@:.o=.symtypes)) \
+ $(if $(KBUILD_GENDWARFKSYMS_STABLE), --stable)
-quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
- cmd_cc_symtypes_c = $(call cmd_gensymtypes_c,true,$@) >/dev/null
+genksyms = $(objtree)/scripts/genksyms/genksyms \
+ $(if $(KBUILD_SYMTYPES), -T $(@:.o=.symtypes)) \
+ $(if $(KBUILD_PRESERVE), -p) \
+ $(addprefix -r , $(wildcard $(@:.o=.symref)))
-$(obj)/%.symtypes : $(src)/%.c FORCE
- $(call cmd,cc_symtypes_c)
+# These mirror gensymtypes_S and co below, keep them in synch.
+ifdef CONFIG_GENDWARFKSYMS
+cmd_gensymtypes_c = $(if $(skip_gendwarfksyms),, \
+ $(call getexportsymbols,\1) | $(gendwarfksyms) $@)
+else
+cmd_gensymtypes_c = $(CPP) -D__GENKSYMS__ $(c_flags) $< | $(genksyms)
+endif # CONFIG_GENDWARFKSYMS
# 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 -fno-discard-value-names -o $@ $<
-$(obj)/%.ll: $(src)/%.c FORCE
+$(obj)/%.ll: $(obj)/%.c FORCE
$(call if_changed_dep,cc_ll_c)
# C (.c) files
@@ -147,21 +220,10 @@ $(obj)/%.ll: $(src)/%.c FORCE
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_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 dump them into the .cmd file.
@@ -169,9 +231,8 @@ ifdef CONFIG_MODVERSIONS
# be compiled and linked to the kernel and/or modules.
gen_symversions = \
- if $(NM) $@ 2>/dev/null | grep -q __ksymtab; then \
- $(call cmd_gensymtypes_$(1),$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
- >> $(dot-target).cmd; \
+ if $(NM) $@ 2>/dev/null | grep -q ' __export_symbol_'; then \
+ $(cmd_gensymtypes_$1) >> $(dot-target).cmd; \
fi
cmd_gen_symversions_c = $(call gen_symversions,c)
@@ -211,44 +272,18 @@ endif # CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
# '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
-is-standard-object = $(if $(filter-out y%, $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n),y)
+is-standard-object = $(if $(filter-out y%, $(OBJECT_FILES_NON_STANDARD_$(target-stem).o)$(OBJECT_FILES_NON_STANDARD)n),$(is-kernel-object))
-$(obj)/%.o: objtool-enabled = $(if $(is-standard-object),$(if $(delay-objtool),$(is-single-obj-m),y))
-
-ifdef CONFIG_TRIM_UNUSED_KSYMS
-cmd_gen_ksymdeps = \
- $(CONFIG_SHELL) $(srctree)/scripts/gen_ksymdeps.sh $@ >> $(dot-target).cmd
+ifdef CONFIG_OBJTOOL
+$(obj)/%.o: private objtool-enabled = $(if $(is-standard-object),$(if $(delay-objtool),$(is-single-obj-m),y))
endif
-cmd_check_local_export = $(srctree)/scripts/check-local-export $@
-
ifneq ($(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_and_fixdep,cc_o_c)
- $(call cmd,gen_ksymdeps)
- $(call cmd,check_local_export)
- $(call cmd,checksrc)
- $(call cmd,checkdoc)
- $(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,check_local_export)
- $(call cmd,gen_objtooldep)
- $(call cmd,gen_symversions_S)
- $(call cmd,warn_shared_object)
-endef
-
# Built-in and composite module parts
-$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
+$(obj)/%.o: $(obj)/%.c $(recordmcount_source) FORCE
$(call if_changed_rule,cc_o_c)
$(call cmd,force_checksrc)
@@ -260,37 +295,44 @@ cmd_mod = printf '%s\n' $(call real-search, $*.o, .o, -objs -y -m) | \
$(obj)/%.mod: FORCE
$(call if_changed,mod)
-# List module undefined symbols
-cmd_undefined_syms = $(NM) $< | sed -n 's/^ *U //p' > $@
-
-$(obj)/%.usyms: $(obj)/%.o FORCE
- $(call if_changed,undefined_syms)
-
quiet_cmd_cc_lst_c = MKLST $@
cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
$(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
System.map $(OBJDUMP) > $@
-$(obj)/%.lst: $(src)/%.c FORCE
+$(obj)/%.lst: $(obj)/%.c FORCE
$(call if_changed_dep,cc_lst_c)
# Compile Rust sources (.rs)
# ---------------------------------------------------------------------------
-rust_allowed_features := core_ffi_c
+# The features in this list are the ones allowed for non-`rust/` code.
+#
+# - Stable since Rust 1.81.0: `feature(lint_reasons)`.
+# - Stable since Rust 1.82.0: `feature(asm_const)`,
+# `feature(offset_of_nested)`, `feature(raw_ref_op)`.
+# - Stable since Rust 1.87.0: `feature(asm_goto)`.
+# - Expected to become stable: `feature(arbitrary_self_types)`.
+# - To be determined: `feature(used_with_arg)`.
+#
+# Please see https://github.com/Rust-for-Linux/linux/issues/2 for details on
+# the unstable features in use.
+rust_allowed_features := asm_const,asm_goto,arbitrary_self_types,lint_reasons,offset_of_nested,raw_ref_op,used_with_arg
+# `--out-dir` is required to avoid temporaries being created by `rustc` in the
+# current working directory, which may be not accessible in the out-of-tree
+# modules case.
rust_common_cmd = \
+ OBJTREE=$(abspath $(objtree)) \
RUST_MODFILE=$(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 --out-dir $(obj) -L $(objtree)/rust/ \
- --crate-name $(basename $(notdir $@))
-
-rust_handle_depfile = \
- mv $(obj)/$(basename $(notdir $@)).d $(depfile); \
- sed -i '/^\#/d' $(depfile)
+ -Zunstable-options --extern pin_init --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
@@ -301,37 +343,41 @@ rust_handle_depfile = \
# would not match each other.
quiet_cmd_rustc_o_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@
- cmd_rustc_o_rs = \
- $(rust_common_cmd) --emit=dep-info,obj $<; \
- $(rust_handle_depfile)
+ cmd_rustc_o_rs = $(rust_common_cmd) --emit=obj=$@ $< $(cmd_objtool)
+
+define rule_rustc_o_rs
+ $(call cmd_and_fixdep,rustc_o_rs)
+ $(call cmd,gen_objtooldep)
+endef
-$(obj)/%.o: $(src)/%.rs FORCE
- $(call if_changed_dep,rustc_o_rs)
+$(obj)/%.o: $(obj)/%.rs FORCE
+ +$(call if_changed_rule,rustc_o_rs)
quiet_cmd_rustc_rsi_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@
cmd_rustc_rsi_rs = \
- $(rust_common_cmd) --emit=dep-info -Zunpretty=expanded $< >$@; \
- command -v $(RUSTFMT) >/dev/null && $(RUSTFMT) $@; \
- $(rust_handle_depfile)
+ $(rust_common_cmd) -Zunpretty=expanded $< >$@; \
+ command -v $(RUSTFMT) >/dev/null && $(RUSTFMT) $@
-$(obj)/%.rsi: $(src)/%.rs FORCE
- $(call if_changed_dep,rustc_rsi_rs)
+$(obj)/%.rsi: $(obj)/%.rs FORCE
+ +$(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=dep-info,asm $<; \
- $(rust_handle_depfile)
+ cmd_rustc_s_rs = $(rust_common_cmd) --emit=asm=$@ $<
-$(obj)/%.s: $(src)/%.rs FORCE
- $(call if_changed_dep,rustc_s_rs)
+$(obj)/%.s: $(obj)/%.rs FORCE
+ +$(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=dep-info,llvm-ir $<; \
- $(rust_handle_depfile)
+ cmd_rustc_ll_rs = $(rust_common_cmd) --emit=llvm-ir=$@ $<
+
+$(obj)/%.ll: $(obj)/%.rs FORCE
+ +$(call if_changed_dep,rustc_ll_rs)
+
+quiet_cmd_rustc_rs_rs_S = RSCPP $(quiet_modtag) $@
+ cmd_rustc_rs_rs_S = $(CPP) $(c_flags) -xc -C -P $< | sed '1,/^\/\/ Cut here.$$/d' >$@
-$(obj)/%.ll: $(src)/%.rs FORCE
- $(call if_changed_dep,rustc_ll_rs)
+$(obj)/%.rs: $(obj)/%.rs.S FORCE
+ +$(call if_changed_dep,rustc_rs_rs_S)
# Compile assembler sources (.S)
# ---------------------------------------------------------------------------
@@ -344,33 +390,33 @@ $(obj)/%.ll: $(src)/%.rs FORCE
# This is convoluted. The .S file must first be preprocessed to run guards and
# expand names, then the resulting exports must be constructed into plain
# EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed
-# to make the genksyms input.
+# to make the genksyms input or compiled into an object for gendwarfksyms.
#
# These mirror gensymtypes_c and co above, keep them in synch.
-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 - | $(genksyms)
-
-quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@
- cmd_cc_symtypes_S = $(call cmd_gensymtypes_S,true,$@) >/dev/null
-
-$(obj)/%.symtypes : $(src)/%.S FORCE
- $(call cmd,cc_symtypes_S)
-
+getasmexports = \
+ { echo "\#include <linux/kernel.h>" ; \
+ echo "\#include <linux/string.h>" ; \
+ echo "\#include <asm/asm-prototypes.h>" ; \
+ $(call getexportsymbols,EXPORT_SYMBOL(\1);) ; }
+
+ifdef CONFIG_GENDWARFKSYMS
+cmd_gensymtypes_S = \
+ $(getasmexports) | \
+ $(CC) $(c_flags) -c -o $(@:.o=.gendwarfksyms.o) -xc -; \
+ $(call getexportsymbols,\1) | \
+ $(gendwarfksyms) $(@:.o=.gendwarfksyms.o)
+else
+cmd_gensymtypes_S = \
+ $(getasmexports) | \
+ $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | $(genksyms)
+endif # CONFIG_GENDWARFKSYMS
quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@
cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $<
-$(obj)/%.s: $(src)/%.S FORCE
+$(obj)/%.s: $(obj)/%.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_objtool)
-
ifdef CONFIG_ASM_MODVERSIONS
# versioning matches the C process described above, with difference that
@@ -380,12 +426,12 @@ cmd_gen_symversions_S = $(call gen_symversions,S)
endif
-$(obj)/%.o: $(src)/%.S FORCE
+$(obj)/%.o: $(obj)/%.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 += $(real-dtb-y) $(lib-y) $(always-y)
+targets += $(lib-y) $(always-y)
# Linker scripts preprocessor (.lds.S -> .lds)
# ---------------------------------------------------------------------------
@@ -426,20 +472,15 @@ quiet_cmd_ar_builtin = AR $@
$(obj)/built-in.a: $(real-obj-y) FORCE
$(call if_changed,ar_builtin)
-#
-# Rule to create modules.order file
-#
-# Create commands to either record .ko file or cat modules.order from
-# a subdirectory
-# Add $(obj-m) as the prerequisite to avoid updating the timestamp of
-# modules.order unless contained modules are updated.
+# This is a list of build artifacts from the current Makefile and its
+# sub-directories. The timestamp should be updated when any of the member files.
-cmd_modules_order = { $(foreach m, $(real-prereqs), \
- $(if $(filter %/modules.order, $m), cat $m, echo $m);) :; } \
+cmd_gen_order = { $(foreach m, $(real-prereqs), \
+ $(if $(filter %/$(notdir $@), $m), cat $m, echo $m);) :; } \
> $@
$(obj)/modules.order: $(obj-m) FORCE
- $(call if_changed,modules_order)
+ $(call if_changed,gen_order)
#
# Rule to compile a set of .o files into one .a file (with symbol table)
@@ -449,15 +490,15 @@ $(obj)/lib.a: $(lib-y) FORCE
$(call if_changed,ar)
quiet_cmd_ld_multi_m = LD [M] $@
- cmd_ld_multi_m = $(LD) $(ld_flags) -r -o $@ @$(patsubst %.o,%.mod,$@) $(cmd_objtool)
+ cmd_ld_multi_m = $(LD) $(ld_flags) -r -o $@ @$< $(cmd_objtool)
define rule_ld_multi_m
$(call cmd_and_savecmd,ld_multi_m)
$(call cmd,gen_objtooldep)
endef
-$(multi-obj-m): objtool-enabled := $(delay-objtool)
-$(multi-obj-m): part-of-module := y
+$(multi-obj-m): private objtool-enabled := $(delay-objtool)
+$(multi-obj-m): private 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)
@@ -469,15 +510,26 @@ intermediate_targets = $(foreach sfx, $(2), \
$(patsubst %$(strip $(1)),%$(sfx), \
$(filter %$(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)
+targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h)
+
+# Include additional build rules when necessary
+# ---------------------------------------------------------------------------
+
+# $(sort ...) is used here to remove duplicated words and excessive spaces.
+hostprogs := $(sort $(hostprogs))
+ifneq ($(hostprogs),)
+include $(srctree)/scripts/Makefile.host
+endif
+
+# $(sort ...) is used here to remove duplicated words and excessive spaces.
+userprogs := $(sort $(userprogs))
+ifneq ($(userprogs),)
+include $(srctree)/scripts/Makefile.userprogs
+endif
+
+ifneq ($(need-dtbslist)$(dtb-y)$(dtb-)$(filter %.dtb %.dtb.o %.dtbo.o,$(targets)),)
+include $(srctree)/scripts/Makefile.dtbs
+endif
# Build
# ---------------------------------------------------------------------------
@@ -506,7 +558,7 @@ $(subdir-ym):
need-modorder=$(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.
+# Add FORCE to the prerequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
PHONY += FORCE
generated by cgit (git 2.34.1) at 2025-12-25 17:54:18 +0000