[thirdparty/u-boot.git] / scripts / Makefile.build

# SPDX-License-Identifier: GPL-2.0
# ==========================================================================
# Building
# ==========================================================================

# Modified for U-Boot
prefix := tpl
src := $(patsubst $(prefix)/%,%,$(obj))
ifeq ($(obj),$(src))
prefix := spl
src := $(patsubst $(prefix)/%,%,$(obj))
ifeq ($(obj),$(src))
prefix := .
endif
endif

PHONY := __build
__build:

# Init all relevant variables used in kbuild files so
# 1) they have correct type
# 2) they do not inherit any value from the environment
obj-y :=
obj-m :=
lib-y :=
lib-m :=
always :=
targets :=
subdir-y :=
subdir-m :=
EXTRA_AFLAGS   :=
EXTRA_CFLAGS   :=
EXTRA_CPPFLAGS :=
EXTRA_LDFLAGS  :=
asflags-y  :=
ccflags-y  :=
cppflags-y :=
ldflags-y  :=

subdir-asflags-y :=
subdir-ccflags-y :=

# Read auto.conf if it exists, otherwise ignore
# Modified for U-Boot
-include include/config/auto.conf
-include $(prefix)/include/autoconf.mk
include scripts/Makefile.uncmd_spl

include scripts/Kbuild.include

# For backward compatibility check that these variables do not change
save-cflags := $(CFLAGS)

# 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 $(kbuild-file)

# Added for U-Boot
asflags-y  += $(PLATFORM_CPPFLAGS)
ccflags-y  += $(PLATFORM_CPPFLAGS)
cppflags-y += $(PLATFORM_CPPFLAGS)

# If the save-* variables changed error out
ifeq ($(KBUILD_NOPEDANTIC),)
        ifneq ("$(save-cflags)","$(CFLAGS)")
                $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y)
        endif
endif

include scripts/Makefile.lib

ifdef host-progs
ifneq ($(hostprogs-y),$(host-progs))
$(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!)
hostprogs-y += $(host-progs)
endif
endif

# Do not include host rules unless needed
ifneq ($(hostprogs-y)$(hostprogs-m),)
include scripts/Makefile.host
endif

# Uncommented for U-Boot
#  We need to create output dicrectory for SPL and TPL even for in-tree build
#ifneq ($(KBUILD_SRC),)
# Create output directory if not already present
_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))

# Create directories for object files if directory does not exist
# Needed when obj-y := dir/file.o syntax is used
_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d)))
#endif

ifndef obj
$(warning kbuild: Makefile.build is included improperly)
endif

# ===========================================================================

ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
lib-target := $(obj)/lib.a
endif

ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),)
builtin-target := $(obj)/built-in.o
endif

modorder-target := $(obj)/modules.order

# We keep a list of all modules in $(MODVERDIR)

__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
	 $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
	 $(subdir-ym) $(always)
	@:

# Linus' kernel sanity checking tool
ifneq ($(KBUILD_CHECKSRC),0)
  ifeq ($(KBUILD_CHECKSRC),2)
    quiet_cmd_force_checksrc = CHECK   $<
          cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
  else
      quiet_cmd_checksrc     = CHECK   $<
            cmd_checksrc     = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
  endif
endif

# Do section mismatch analysis for each module/built-in.o
ifdef CONFIG_DEBUG_SECTION_MISMATCH
  cmd_secanalysis = ; scripts/mod/modpost $@
endif

# Compile C sources (.c)
# ---------------------------------------------------------------------------

# Default is built-in, unless we know otherwise
modkern_cflags =                                          \
	$(if $(part-of-module),                           \
		$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
		$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
quiet_modtag := $(empty)   $(empty)

$(real-objs-m)        : part-of-module := y
$(real-objs-m:.o=.i)  : part-of-module := y
$(real-objs-m:.o=.s)  : part-of-module := y
$(real-objs-m:.o=.lst): part-of-module := y

$(real-objs-m)        : quiet_modtag := [M]
$(real-objs-m:.o=.i)  : quiet_modtag := [M]
$(real-objs-m:.o=.s)  : quiet_modtag := [M]
$(real-objs-m:.o=.lst): quiet_modtag := [M]

$(obj-m)              : quiet_modtag := [M]

# Default for not multi-part modules
modname = $(basetarget)

$(multi-objs-m)         : modname = $(modname-multi)
$(multi-objs-m:.o=.i)   : modname = $(modname-multi)
$(multi-objs-m:.o=.s)   : modname = $(modname-multi)
$(multi-objs-m:.o=.lst) : modname = $(modname-multi)
$(multi-objs-y)         : modname = $(modname-multi)
$(multi-objs-y:.o=.i)   : modname = $(modname-multi)
$(multi-objs-y:.o=.s)   : modname = $(modname-multi)
$(multi-objs-y:.o=.lst) : modname = $(modname-multi)

quiet_cmd_cc_s_c = CC $(quiet_modtag)  $@
cmd_cc_s_c       = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<

$(obj)/%.s: $(src)/%.c FORCE
	$(call if_changed_dep,cc_s_c)

quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@
cmd_cc_i_c       = $(CPP) $(c_flags)   -o $@ $<

$(obj)/%.i: $(src)/%.c FORCE
	$(call if_changed_dep,cc_i_c)

cmd_gensymtypes =                                                           \
    $(CPP) -D__GENKSYMS__ $(c_flags) $< |                                   \
    $(GENKSYMS) $(if $(1), -T $(2))                                         \
     $(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))             \
     $(if $(KBUILD_PRESERVE),-p)                                            \
     -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))

quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
cmd_cc_symtypes_c =                                                         \
    set -e;                                                                 \
    $(call cmd_gensymtypes,true,$@) >/dev/null;                             \
    test -s $@ || rm -f $@

$(obj)/%.symtypes : $(src)/%.c FORCE
	$(call cmd,cc_symtypes_c)

# C (.c) files
# The C file is compiled and updated dependency information is generated.
# (See cmd_cc_o_c + relevant part of rule_cc_o_c)

quiet_cmd_cc_o_c = CC $(quiet_modtag)  $@

ifndef CONFIG_MODVERSIONS
cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<

else
# When module versioning is enabled the following steps are executed:
# o compile a .tmp_<file>.o from <file>.c
# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
#   not export symbols, we just rename .tmp_<file>.o to <file>.o and
#   are 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 <file>.o from .tmp_<file>.o using the linker to
#   replace the unresolved symbols __crc_exported_symbol with
#   the actual value of the checksum generated by genksyms

cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
cmd_modversions =								\
	if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then		\
		$(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes))	\
		    > $(@D)/.tmp_$(@F:.o=.ver);					\
										\
		$(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) 			\
			-T $(@D)/.tmp_$(@F:.o=.ver);				\
		rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver);		\
	else									\
		mv -f $(@D)/.tmp_$(@F) $@;					\
	fi;
endif

ifdef CONFIG_FTRACE_MCOUNT_RECORD
ifdef BUILD_C_RECORDMCOUNT
ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
  RECORDMCOUNT_FLAGS = -w
endif
# Due to recursion, we must skip empty.o.
# The empty.o file is created in the make process in order to determine
#  the target endianness and word size. It is made before all other C
#  files, including recordmcount.
sub_cmd_record_mcount =					\
	if [ $(@) != "scripts/mod/empty.o" ]; then	\
		$(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)";	\
	fi;
recordmcount_source := $(srctree)/scripts/recordmcount.c \
		    $(srctree)/scripts/recordmcount.h
else
sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
	"$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
	"$(if $(CONFIG_64BIT),64,32)" \
	"$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \
	"$(LD)" "$(NM)" "$(RM)" "$(MV)" \
	"$(if $(part-of-module),1,0)" "$(@)";
recordmcount_source := $(srctree)/scripts/recordmcount.pl
endif
cmd_record_mcount =						\
	if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" =	\
	     "$(CC_FLAGS_FTRACE)" ]; then			\
		$(sub_cmd_record_mcount)			\
	fi;
endif

define rule_cc_o_c
	$(call echo-cmd,checksrc) $(cmd_checksrc)			  \
	$(call echo-cmd,cc_o_c) $(cmd_cc_o_c);				  \
	$(cmd_modversions)						  \
	$(call echo-cmd,record_mcount)					  \
	$(cmd_record_mcount)						  \
	scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' >    \
	                                              $(dot-target).tmp;  \
	rm -f $(depfile);						  \
	mv -f $(dot-target).tmp $(dot-target).cmd
endef

# Built-in and composite module parts
$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
	$(call cmd,force_checksrc)
	$(call if_changed_rule,cc_o_c)

# Single-part modules are special since we need to mark them in $(MODVERDIR)

$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
	$(call cmd,force_checksrc)
	$(call if_changed_rule,cc_o_c)
	@{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)

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
	$(call if_changed_dep,cc_lst_c)

# Compile assembler sources (.S)
# ---------------------------------------------------------------------------

modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)

$(real-objs-m)      : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)

quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
cmd_as_s_S       = $(CPP) $(a_flags)   -o $@ $<

$(obj)/%.s: $(src)/%.S FORCE
	$(call if_changed_dep,as_s_S)

quiet_cmd_as_o_S = AS $(quiet_modtag)  $@
cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<

$(obj)/%.o: $(src)/%.S FORCE
	$(call if_changed_dep,as_o_S)

targets += $(real-objs-y) $(real-objs-m) $(lib-y)
targets += $(extra-y) $(MAKECMDGOALS) $(always)

# Linker scripts preprocessor (.lds.S -> .lds)
# ---------------------------------------------------------------------------
quiet_cmd_cpp_lds_S = LDS     $@
      cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
	                     -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<

$(obj)/%.lds: $(src)/%.lds.S FORCE
	$(call if_changed_dep,cpp_lds_S)

# ASN.1 grammar
# ---------------------------------------------------------------------------
quiet_cmd_asn1_compiler = ASN.1   $@
      cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
				$(subst .h,.c,$@) $(subst .c,.h,$@)

.PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h

$(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
	$(call cmd,asn1_compiler)

# Build the compiled-in targets
# ---------------------------------------------------------------------------

# To build objects in subdirs, we need to descend into the directories
$(sort $(subdir-obj-y)): $(subdir-ym) ;

#
# Rule to compile a set of .o files into one .o file
#
ifdef builtin-target
quiet_cmd_link_o_target = LD      $@
# If the list of objects to link is empty, just create an empty built-in.o
cmd_link_o_target = $(if $(strip $(obj-y)),\
		      $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \
		      $(cmd_secanalysis),\
		      rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@)

$(builtin-target): $(obj-y) FORCE
	$(call if_changed,link_o_target)

targets += $(builtin-target)
endif # builtin-target

#
# Rule to create modules.order file
#
# Create commands to either record .ko file or cat modules.order from
# a subdirectory
modorder-cmds =						\
	$(foreach m, $(modorder),			\
		$(if $(filter %/modules.order, $m),	\
			cat $m;, echo kernel/$m;))

$(modorder-target): $(subdir-ym) FORCE
	$(Q)(cat /dev/null; $(modorder-cmds)) > $@

#
# Rule to compile a set of .o files into one .a file
#
ifdef lib-target
quiet_cmd_link_l_target = AR      $@
cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y)

$(lib-target): $(lib-y) FORCE
	$(call if_changed,link_l_target)

targets += $(lib-target)
endif

#
# Rule to link composite objects
#
#  Composite objects are specified in kbuild makefile as follows:
#    <composite-object>-objs := <list of .o files>
#  or
#    <composite-object>-y    := <list of .o files>
link_multi_deps =                     \
$(filter $(addprefix $(obj)/,         \
$($(subst $(obj)/,,$(@:.o=-objs)))    \
$($(subst $(obj)/,,$(@:.o=-y)))), $^)

quiet_cmd_link_multi-y = LD      $@
cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)

quiet_cmd_link_multi-m = LD [M]  $@
cmd_link_multi-m = $(cmd_link_multi-y)

$(multi-used-y): FORCE
	$(call if_changed,link_multi-y)
$(call multi_depend, $(multi-used-y), .o, -objs -y)

$(multi-used-m): FORCE
	$(call if_changed,link_multi-m)
	@{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod)
$(call multi_depend, $(multi-used-m), .o, -objs -y)

targets += $(multi-used-y) $(multi-used-m)


# Descending
# ---------------------------------------------------------------------------

PHONY += $(subdir-ym)
$(subdir-ym):
	$(Q)$(MAKE) $(build)=$@

# Add FORCE to the prequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------

PHONY += FORCE

FORCE:

# 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
# exist, we will rebuild anyway in that case.

targets := $(wildcard $(sort $(targets)))
cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))

ifneq ($(cmd_files),)
  include $(cmd_files)
endif

# Declare the contents of the .PHONY variable as phony.  We keep that
# information in a variable se we can use it in if_changed and friends.

.PHONY: $(PHONY)
Commit	Line	Data
83d290c5	1	# SPDX-License-Identifier: GPL-2.0
22433fc5 MY	2	# ==========================================================================
	3	# Building
	4	# ==========================================================================
	5
6825a95b	6	# Modified for U-Boot
51148790 MY	7	prefix := tpl
	8	src := $(patsubst $(prefix)/%,%,$(obj))
	9	ifeq ($(obj),$(src))
	10	prefix := spl
	11	src := $(patsubst $(prefix)/%,%,$(obj))
	12	ifeq ($(obj),$(src))
	13	prefix := .
	14	endif
6825a95b	15	endif
22433fc5 MY	16
	17	PHONY := __build
	18	__build:
	19
	20	# Init all relevant variables used in kbuild files so
	21	# 1) they have correct type
	22	# 2) they do not inherit any value from the environment
	23	obj-y :=
	24	obj-m :=
	25	lib-y :=
	26	lib-m :=
	27	always :=
	28	targets :=
	29	subdir-y :=
	30	subdir-m :=
	31	EXTRA_AFLAGS :=
	32	EXTRA_CFLAGS :=
	33	EXTRA_CPPFLAGS :=
	34	EXTRA_LDFLAGS :=
	35	asflags-y :=
	36	ccflags-y :=
	37	cppflags-y :=
	38	ldflags-y :=
	39
	40	subdir-asflags-y :=
	41	subdir-ccflags-y :=
	42
	43	# Read auto.conf if it exists, otherwise ignore
51148790	44	# Modified for U-Boot
e02ee254	45	-include include/config/auto.conf
51148790	46	-include $(prefix)/include/autoconf.mk
e02ee254	47	include scripts/Makefile.uncmd_spl
01072b44	48
22433fc5 MY	49	include scripts/Kbuild.include
	50
	51	# For backward compatibility check that these variables do not change
	52	save-cflags := $(CFLAGS)
	53
	54	# The filename Kbuild has precedence over Makefile
	55	kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
	56	kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
	57	include $(kbuild-file)
	58
026f9cf2 MY	59	# Added for U-Boot
	60	asflags-y += $(PLATFORM_CPPFLAGS)
	61	ccflags-y += $(PLATFORM_CPPFLAGS)
	62	cppflags-y += $(PLATFORM_CPPFLAGS)
	63
22433fc5 MY	64	# If the save-* variables changed error out
	65	ifeq ($(KBUILD_NOPEDANTIC),)
	66	ifneq ("$(save-cflags)","$(CFLAGS)")
	67	$(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y)
	68	endif
	69	endif
	70
22433fc5 MY	71	include scripts/Makefile.lib
	72
	73	ifdef host-progs
	74	ifneq ($(hostprogs-y),$(host-progs))
	75	$(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!)
	76	hostprogs-y += $(host-progs)
	77	endif
	78	endif
	79
	80	# Do not include host rules unless needed
	81	ifneq ($(hostprogs-y)$(hostprogs-m),)
	82	include scripts/Makefile.host
	83	endif
	84
6825a95b MY	85	# Uncommented for U-Boot
	86	# We need to create output dicrectory for SPL and TPL even for in-tree build
	87	#ifneq ($(KBUILD_SRC),)
22433fc5 MY	88	# Create output directory if not already present
	89	_dummy := $(shell [ -d $(obj) ] \|\| mkdir -p $(obj))
	90
	91	# Create directories for object files if directory does not exist
	92	# Needed when obj-y := dir/file.o syntax is used
	93	_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] \|\| mkdir -p $(d)))
6825a95b	94	#endif
22433fc5 MY	95
	96	ifndef obj
	97	$(warning kbuild: Makefile.build is included improperly)
	98	endif
	99
	100	# ===========================================================================
	101
176d0982	102	ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
22433fc5 MY	103	lib-target := $(obj)/lib.a
	104	endif
	105
176d0982	106	ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),)
22433fc5 MY	107	builtin-target := $(obj)/built-in.o
	108	endif
	109
	110	modorder-target := $(obj)/modules.order
	111
	112	# We keep a list of all modules in $(MODVERDIR)
	113
	114	__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
	115	$(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
	116	$(subdir-ym) $(always)
	117	@:
	118
	119	# Linus' kernel sanity checking tool
	120	ifneq ($(KBUILD_CHECKSRC),0)
	121	ifeq ($(KBUILD_CHECKSRC),2)
	122	quiet_cmd_force_checksrc = CHECK $<
	123	cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
	124	else
	125	quiet_cmd_checksrc = CHECK $<
	126	cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
	127	endif
	128	endif
	129
	130	# Do section mismatch analysis for each module/built-in.o
	131	ifdef CONFIG_DEBUG_SECTION_MISMATCH
	132	cmd_secanalysis = ; scripts/mod/modpost $@
	133	endif
	134
	135	# Compile C sources (.c)
	136	# ---------------------------------------------------------------------------
	137
	138	# Default is built-in, unless we know otherwise
	139	modkern_cflags = \
	140	$(if $(part-of-module), \
	141	$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
	142	$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
	143	quiet_modtag := $(empty) $(empty)
	144
	145	$(real-objs-m) : part-of-module := y
	146	$(real-objs-m:.o=.i) : part-of-module := y
	147	$(real-objs-m:.o=.s) : part-of-module := y
	148	$(real-objs-m:.o=.lst): part-of-module := y
	149
	150	$(real-objs-m) : quiet_modtag := [M]
	151	$(real-objs-m:.o=.i) : quiet_modtag := [M]
	152	$(real-objs-m:.o=.s) : quiet_modtag := [M]
	153	$(real-objs-m:.o=.lst): quiet_modtag := [M]
	154
	155	$(obj-m) : quiet_modtag := [M]
	156
	157	# Default for not multi-part modules
	158	modname = $(basetarget)
	159
	160	$(multi-objs-m) : modname = $(modname-multi)
	161	$(multi-objs-m:.o=.i) : modname = $(modname-multi)
	162	$(multi-objs-m:.o=.s) : modname = $(modname-multi)
	163	$(multi-objs-m:.o=.lst) : modname = $(modname-multi)
	164	$(multi-objs-y) : modname = $(modname-multi)
	165	$(multi-objs-y:.o=.i) : modname = $(modname-multi)
	166	$(multi-objs-y:.o=.s) : modname = $(modname-multi)
	167	$(multi-objs-y:.o=.lst) : modname = $(modname-multi)
	168
	169	quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
598e2d33	170	cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
22433fc5 MY	171
	172	$(obj)/%.s: $(src)/%.c FORCE
	173	$(call if_changed_dep,cc_s_c)
	174
	175	quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@
	176	cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $<
	177
	178	$(obj)/%.i: $(src)/%.c FORCE
	179	$(call if_changed_dep,cc_i_c)
	180
	181	cmd_gensymtypes = \
	182	$(CPP) -D__GENKSYMS__ $(c_flags) $< \| \
	183	$(GENKSYMS) $(if $(1), -T $(2)) \
	184	$(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \
	185	$(if $(KBUILD_PRESERVE),-p) \
	186	-r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
	187
	188	quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
	189	cmd_cc_symtypes_c = \
	190	set -e; \
	191	$(call cmd_gensymtypes,true,$@) >/dev/null; \
	192	test -s $@ \|\| rm -f $@
	193
	194	$(obj)/%.symtypes : $(src)/%.c FORCE
	195	$(call cmd,cc_symtypes_c)
	196
	197	# C (.c) files
	198	# The C file is compiled and updated dependency information is generated.
	199	# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
	200
	201	quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
	202
	203	ifndef CONFIG_MODVERSIONS
	204	cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
	205
	206	else
	207	# When module versioning is enabled the following steps are executed:
	208	# o compile a .tmp_<file>.o from <file>.c
	209	# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
	210	# not export symbols, we just rename .tmp_<file>.o to <file>.o and
	211	# are done.
	212	# o otherwise, we calculate symbol versions using the good old
	213	# genksyms on the preprocessed source and postprocess them in a way
	214	# that they are usable as a linker script
	215	# o generate <file>.o from .tmp_<file>.o using the linker to
	216	# replace the unresolved symbols __crc_exported_symbol with
	217	# the actual value of the checksum generated by genksyms
	218
	219	cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
	220	cmd_modversions = \
	221	if $(OBJDUMP) -h $(@D)/.tmp_$(@F) \| grep -q __ksymtab; then \
	222	$(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
	223	> $(@D)/.tmp_$(@F:.o=.ver); \
	224	\
	225	$(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
	226	-T $(@D)/.tmp_$(@F:.o=.ver); \
	227	rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
	228	else \
	229	mv -f $(@D)/.tmp_$(@F) $@; \
	230	fi;
	231	endif
	232
	233	ifdef CONFIG_FTRACE_MCOUNT_RECORD
	234	ifdef BUILD_C_RECORDMCOUNT
235	ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
236	RECORDMCOUNT_FLAGS = -w
237	endif
238	# Due to recursion, we must skip empty.o.
239	# The empty.o file is created in the make process in order to determine
240	# the target endianness and word size. It is made before all other C
241	# files, including recordmcount.
242	sub_cmd_record_mcount = \
243	if [ $(@) != "scripts/mod/empty.o" ]; then \
244	$(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \
245	fi;
246	recordmcount_source := $(srctree)/scripts/recordmcount.c \
247	$(srctree)/scripts/recordmcount.h
248	else
249	sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
250	"$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
251	"$(if $(CONFIG_64BIT),64,32)" \
252	"$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \
253	"$(LD)" "$(NM)" "$(RM)" "$(MV)" \
254	"$(if $(part-of-module),1,0)" "$(@)";
255	recordmcount_source := $(srctree)/scripts/recordmcount.pl
256	endif
98bd0e0d MY	257	cmd_record_mcount = \
	258	if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \
	259	"$(CC_FLAGS_FTRACE)" ]; then \
22433fc5 MY	260	$(sub_cmd_record_mcount) \
	261	fi;
	262	endif
	263
	264	define rule_cc_o_c
	265	$(call echo-cmd,checksrc) $(cmd_checksrc) \
	266	$(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \
	267	$(cmd_modversions) \
	268	$(call echo-cmd,record_mcount) \
	269	$(cmd_record_mcount) \
	270	scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \
	271	$(dot-target).tmp; \
	272	rm -f $(depfile); \
	273	mv -f $(dot-target).tmp $(dot-target).cmd
	274	endef
	275
	276	# Built-in and composite module parts
	277	$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
	278	$(call cmd,force_checksrc)
	279	$(call if_changed_rule,cc_o_c)
	280
	281	# Single-part modules are special since we need to mark them in $(MODVERDIR)
	282
	283	$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
	284	$(call cmd,force_checksrc)
	285	$(call if_changed_rule,cc_o_c)
	286	@{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)
	287
	288	quiet_cmd_cc_lst_c = MKLST $@
	289	cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
	290	$(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
	291	System.map $(OBJDUMP) > $@
	292
	293	$(obj)/%.lst: $(src)/%.c FORCE
	294	$(call if_changed_dep,cc_lst_c)
	295
	296	# Compile assembler sources (.S)
	297	# ---------------------------------------------------------------------------
	298
	299	modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)
	300
	301	$(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
	302	$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
	303
	304	quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
45f0ad95	305	cmd_as_s_S = $(CPP) $(a_flags) -o $@ $<
22433fc5 MY	306
	307	$(obj)/%.s: $(src)/%.S FORCE
	308	$(call if_changed_dep,as_s_S)
	309
	310	quiet_cmd_as_o_S = AS $(quiet_modtag) $@
	311	cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
	312
	313	$(obj)/%.o: $(src)/%.S FORCE
	314	$(call if_changed_dep,as_o_S)
	315
	316	targets += $(real-objs-y) $(real-objs-m) $(lib-y)
	317	targets += $(extra-y) $(MAKECMDGOALS) $(always)
	318
	319	# Linker scripts preprocessor (.lds.S -> .lds)
	320	# ---------------------------------------------------------------------------
	321	quiet_cmd_cpp_lds_S = LDS $@
	322	cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
	323	-D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
	324
	325	$(obj)/%.lds: $(src)/%.lds.S FORCE
	326	$(call if_changed_dep,cpp_lds_S)
	327
	328	# ASN.1 grammar
	329	# ---------------------------------------------------------------------------
	330	quiet_cmd_asn1_compiler = ASN.1 $@
	331	cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
	332	$(subst .h,.c,$@) $(subst .c,.h,$@)
	333
	334	.PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h
	335
	336	$(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
	337	$(call cmd,asn1_compiler)
	338
	339	# Build the compiled-in targets
	340	# ---------------------------------------------------------------------------
	341
	342	# To build objects in subdirs, we need to descend into the directories
	343	$(sort $(subdir-obj-y)): $(subdir-ym) ;
	344
	345	#
	346	# Rule to compile a set of .o files into one .o file
	347	#
	348	ifdef builtin-target
	349	quiet_cmd_link_o_target = LD $@
	350	# If the list of objects to link is empty, just create an empty built-in.o
	351	cmd_link_o_target = $(if $(strip $(obj-y)),\
	352	$(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \
	353	$(cmd_secanalysis),\
	354	rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@)
	355
	356	$(builtin-target): $(obj-y) FORCE
	357	$(call if_changed,link_o_target)
	358
	359	targets += $(builtin-target)
	360	endif # builtin-target
	361
	362	#
	363	# Rule to create modules.order file
	364	#
	365	# Create commands to either record .ko file or cat modules.order from
	366	# a subdirectory
	367	modorder-cmds = \
	368	$(foreach m, $(modorder), \
	369	$(if $(filter %/modules.order, $m), \
370	cat $m;, echo kernel/$m;))
371
372	$(modorder-target): $(subdir-ym) FORCE
373	$(Q)(cat /dev/null; $(modorder-cmds)) > $@
374
375	#
376	# Rule to compile a set of .o files into one .a file
377	#
378	ifdef lib-target
379	quiet_cmd_link_l_target = AR $@
380	cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y)
381
382	$(lib-target): $(lib-y) FORCE
383	$(call if_changed,link_l_target)
384
385	targets += $(lib-target)
386	endif
387
388	#
389	# Rule to link composite objects
390	#
391	# Composite objects are specified in kbuild makefile as follows:
392	# <composite-object>-objs := <list of .o files>
393	# or
394	# <composite-object>-y := <list of .o files>
395	link_multi_deps = \
396	$(filter $(addprefix $(obj)/, \
397	$($(subst $(obj)/,,$(@:.o=-objs))) \
398	$($(subst $(obj)/,,$(@:.o=-y)))), $^)
45f0ad95	399
22433fc5 MY	400	quiet_cmd_link_multi-y = LD $@
	401	cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
	402
	403	quiet_cmd_link_multi-m = LD [M] $@
	404	cmd_link_multi-m = $(cmd_link_multi-y)
	405
cb6e7b0d	406	$(multi-used-y): FORCE
22433fc5	407	$(call if_changed,link_multi-y)
cb6e7b0d	408	$(call multi_depend, $(multi-used-y), .o, -objs -y)
22433fc5	409
cb6e7b0d	410	$(multi-used-m): FORCE
22433fc5 MY	411	$(call if_changed,link_multi-m)
22433fc5 MY	412	@{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod)
cb6e7b0d	413	$(call multi_depend, $(multi-used-m), .o, -objs -y)
22433fc5 MY	414
	415	targets += $(multi-used-y) $(multi-used-m)
	416
	417
	418	# Descending
	419	# ---------------------------------------------------------------------------
	420
	421	PHONY += $(subdir-ym)
	422	$(subdir-ym):
	423	$(Q)$(MAKE) $(build)=$@
	424
	425	# Add FORCE to the prequisites of a target to force it to be always rebuilt.
	426	# ---------------------------------------------------------------------------
	427
	428	PHONY += FORCE
	429
	430	FORCE:
	431
	432	# Read all saved command lines and dependencies for the $(targets) we
	433	# may be building above, using $(if_changed{,_dep}). As an
	434	# optimization, we don't need to read them if the target does not
	435	# exist, we will rebuild anyway in that case.
	436
	437	targets := $(wildcard $(sort $(targets)))
	438	cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
	439
	440	ifneq ($(cmd_files),)
	441	include $(cmd_files)
	442	endif
	443
	444	# Declare the contents of the .PHONY variable as phony. We keep that
	445	# information in a variable se we can use it in if_changed and friends.
	446
	447	.PHONY: $(PHONY)