[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

# 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)

include scripts/Makefile.lib

# Do not include host rules unless needed
ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),)
include scripts/Makefile.host
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
ifeq ($(KBUILD_CHECKSRC),1)
  quiet_cmd_checksrc       = CHECK   $<
        cmd_checksrc       = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
else ifeq ($(KBUILD_CHECKSRC),2)
  quiet_cmd_force_checksrc = CHECK   $<
        cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
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))                                         \
     $(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) $(KBUILD_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
# gcc 5 supports generating the mcount tables directly
ifneq ($(call cc-option,-mrecord-mcount,y),y)
KBUILD_CFLAGS += -mrecord-mcount
else
# else do it all manually
ifdef BUILD_C_RECORDMCOUNT
ifeq ("$(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_CPPFLAGS) $(KBUILD_CFLAGS)" \
	"$(LD) $(KBUILD_LDFLAGS)" "$(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 # -record-mcount
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)/tools/asn1_compiler $< \
				$(subst .h,.c,$@) $(subst .c,.h,$@)

$(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/tools/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 = AR      $@
# If the list of objects to link is empty, just create an empty built-in.o
cmd_link_o_target = $(if $(strip $(obj-y)),\
		      rm -f $@; $(AR) cDPrsT $@ $(filter $(obj-y), $^), \
		      rm -f $@; $(AR) cDPrsT$(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 $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@ $(lib-y)

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

targets += $(lib-target)
endif

quiet_cmd_link_multi-y = AR      $@
cmd_link_multi-y = rm -f $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@ $(filter %.o,$^)

quiet_cmd_link_multi-m = AR [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 $(filter %.o,$^); } > $(MODVERDIR)/$(@F:.o=.mod)
$(call multi_depend, $(multi-used-m), .o, -objs -y)

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


# Add intermediate targets:
# When building objects with specific suffix patterns, add intermediate
# targets that the final targets are derived from.
intermediate_targets = $(foreach sfx, $(2), \
				$(patsubst %$(strip $(1)),%$(sfx), \
					$(filter %$(strip $(1)), $(targets))))
# %.lex.o <- %.lex.c <- %.l
# %.tab.o <- %.tab.[ch] <- %.y
targets += $(call intermediate_targets, .lex.o, .lex.c) \
	   $(call intermediate_targets, .tab.o, .tab.c .tab.h)

# 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.

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

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

# Create directories for object files if they do not exist
obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
$(shell mkdir -p $(obj-dirs))

.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
22433fc5 MY	50
22433fc5 MY	51	# The filename Kbuild has precedence over Makefile
	52	kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
	53	kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
	54	include $(kbuild-file)
	55
026f9cf2 MY	56	# Added for U-Boot
	57	asflags-y += $(PLATFORM_CPPFLAGS)
	58	ccflags-y += $(PLATFORM_CPPFLAGS)
	59	cppflags-y += $(PLATFORM_CPPFLAGS)
	60
22433fc5 MY	61	include scripts/Makefile.lib
22433fc5 MY	62
22433fc5	63	# Do not include host rules unless needed
587e4a42	64	ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),)
22433fc5 MY	65	include scripts/Makefile.host
	66	endif
	67
22433fc5 MY	68	ifndef obj
	69	$(warning kbuild: Makefile.build is included improperly)
	70	endif
	71
	72	# ===========================================================================
	73
176d0982	74	ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
22433fc5 MY	75	lib-target := $(obj)/lib.a
	76	endif
	77
176d0982	78	ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),)
22433fc5 MY	79	builtin-target := $(obj)/built-in.o
	80	endif
	81
	82	modorder-target := $(obj)/modules.order
	83
	84	# We keep a list of all modules in $(MODVERDIR)
	85
	86	__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
	87	$(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
	88	$(subdir-ym) $(always)
	89	@:
	90
	91	# Linus' kernel sanity checking tool
473fc279 TR	92	ifeq ($(KBUILD_CHECKSRC),1)
	93	quiet_cmd_checksrc = CHECK $<
	94	cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
	95	else ifeq ($(KBUILD_CHECKSRC),2)
	96	quiet_cmd_force_checksrc = CHECK $<
	97	cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
22433fc5 MY	98	endif
	99
	100	# Do section mismatch analysis for each module/built-in.o
	101	ifdef CONFIG_DEBUG_SECTION_MISMATCH
	102	cmd_secanalysis = ; scripts/mod/modpost $@
	103	endif
	104
	105	# Compile C sources (.c)
	106	# ---------------------------------------------------------------------------
	107
	108	# Default is built-in, unless we know otherwise
	109	modkern_cflags = \
	110	$(if $(part-of-module), \
	111	$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
	112	$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
	113	quiet_modtag := $(empty) $(empty)
	114
	115	$(real-objs-m) : part-of-module := y
	116	$(real-objs-m:.o=.i) : part-of-module := y
	117	$(real-objs-m:.o=.s) : part-of-module := y
	118	$(real-objs-m:.o=.lst): part-of-module := y
	119
	120	$(real-objs-m) : quiet_modtag := [M]
	121	$(real-objs-m:.o=.i) : quiet_modtag := [M]
	122	$(real-objs-m:.o=.s) : quiet_modtag := [M]
	123	$(real-objs-m:.o=.lst): quiet_modtag := [M]
	124
	125	$(obj-m) : quiet_modtag := [M]
	126
	127	# Default for not multi-part modules
	128	modname = $(basetarget)
	129
	130	$(multi-objs-m) : modname = $(modname-multi)
	131	$(multi-objs-m:.o=.i) : modname = $(modname-multi)
	132	$(multi-objs-m:.o=.s) : modname = $(modname-multi)
	133	$(multi-objs-m:.o=.lst) : modname = $(modname-multi)
	134	$(multi-objs-y) : modname = $(modname-multi)
	135	$(multi-objs-y:.o=.i) : modname = $(modname-multi)
	136	$(multi-objs-y:.o=.s) : modname = $(modname-multi)
	137	$(multi-objs-y:.o=.lst) : modname = $(modname-multi)
	138
	139	quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
598e2d33	140	cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
22433fc5 MY	141
	142	$(obj)/%.s: $(src)/%.c FORCE
	143	$(call if_changed_dep,cc_s_c)
	144
	145	quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@
	146	cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $<
	147
	148	$(obj)/%.i: $(src)/%.c FORCE
	149	$(call if_changed_dep,cc_i_c)
	150
	151	cmd_gensymtypes = \
	152	$(CPP) -D__GENKSYMS__ $(c_flags) $< \| \
	153	$(GENKSYMS) $(if $(1), -T $(2)) \
22433fc5 MY	154	$(if $(KBUILD_PRESERVE),-p) \
	155	-r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
	156
	157	quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
	158	cmd_cc_symtypes_c = \
	159	set -e; \
	160	$(call cmd_gensymtypes,true,$@) >/dev/null; \
	161	test -s $@ \|\| rm -f $@
	162
	163	$(obj)/%.symtypes : $(src)/%.c FORCE
	164	$(call cmd,cc_symtypes_c)
	165
	166	# C (.c) files
	167	# The C file is compiled and updated dependency information is generated.
	168	# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
	169
	170	quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
	171
	172	ifndef CONFIG_MODVERSIONS
	173	cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
	174
	175	else
	176	# When module versioning is enabled the following steps are executed:
	177	# o compile a .tmp_<file>.o from <file>.c
	178	# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
	179	# not export symbols, we just rename .tmp_<file>.o to <file>.o and
	180	# are done.
	181	# o otherwise, we calculate symbol versions using the good old
	182	# genksyms on the preprocessed source and postprocess them in a way
	183	# that they are usable as a linker script
	184	# o generate <file>.o from .tmp_<file>.o using the linker to
	185	# replace the unresolved symbols __crc_exported_symbol with
	186	# the actual value of the checksum generated by genksyms
	187
	188	cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
	189	cmd_modversions = \
	190	if $(OBJDUMP) -h $(@D)/.tmp_$(@F) \| grep -q __ksymtab; then \
	191	$(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
	192	> $(@D)/.tmp_$(@F:.o=.ver); \
	193	\
587e4a42	194	$(LD) $(KBUILD_LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
22433fc5 MY	195	-T $(@D)/.tmp_$(@F:.o=.ver); \
	196	rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
	197	else \
	198	mv -f $(@D)/.tmp_$(@F) $@; \
	199	fi;
	200	endif
	201
	202	ifdef CONFIG_FTRACE_MCOUNT_RECORD
5972ff07 TR	203	# gcc 5 supports generating the mcount tables directly
	204	ifneq ($(call cc-option,-mrecord-mcount,y),y)
	205	KBUILD_CFLAGS += -mrecord-mcount
	206	else
	207	# else do it all manually
22433fc5 MY	208	ifdef BUILD_C_RECORDMCOUNT
	209	ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
	210	RECORDMCOUNT_FLAGS = -w
	211	endif
	212	# Due to recursion, we must skip empty.o.
	213	# The empty.o file is created in the make process in order to determine
	214	# the target endianness and word size. It is made before all other C
	215	# files, including recordmcount.
	216	sub_cmd_record_mcount = \
	217	if [ $(@) != "scripts/mod/empty.o" ]; then \
	218	$(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \
	219	fi;
	220	recordmcount_source := $(srctree)/scripts/recordmcount.c \
	221	$(srctree)/scripts/recordmcount.h
	222	else
	223	sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
	224	"$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
	225	"$(if $(CONFIG_64BIT),64,32)" \
587e4a42 TR	226	"$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \
587e4a42 TR	227	"$(LD) $(KBUILD_LDFLAGS)" "$(NM)" "$(RM)" "$(MV)" \
22433fc5 MY	228	"$(if $(part-of-module),1,0)" "$(@)";
	229	recordmcount_source := $(srctree)/scripts/recordmcount.pl
	230	endif
98bd0e0d MY	231	cmd_record_mcount = \
	232	if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \
	233	"$(CC_FLAGS_FTRACE)" ]; then \
22433fc5 MY	234	$(sub_cmd_record_mcount) \
22433fc5 MY	235	fi;
5972ff07	236	endif # -record-mcount
22433fc5 MY	237	endif
	238
	239	define rule_cc_o_c
	240	$(call echo-cmd,checksrc) $(cmd_checksrc) \
	241	$(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \
	242	$(cmd_modversions) \
	243	$(call echo-cmd,record_mcount) \
	244	$(cmd_record_mcount) \
	245	scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \
	246	$(dot-target).tmp; \
	247	rm -f $(depfile); \
	248	mv -f $(dot-target).tmp $(dot-target).cmd
	249	endef
	250
	251	# Built-in and composite module parts
	252	$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
	253	$(call cmd,force_checksrc)
	254	$(call if_changed_rule,cc_o_c)
	255
	256	# Single-part modules are special since we need to mark them in $(MODVERDIR)
	257
	258	$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
	259	$(call cmd,force_checksrc)
	260	$(call if_changed_rule,cc_o_c)
	261	@{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)
	262
	263	quiet_cmd_cc_lst_c = MKLST $@
	264	cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
	265	$(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
	266	System.map $(OBJDUMP) > $@
	267
	268	$(obj)/%.lst: $(src)/%.c FORCE
	269	$(call if_changed_dep,cc_lst_c)
	270
	271	# Compile assembler sources (.S)
	272	# ---------------------------------------------------------------------------
	273
	274	modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)
	275
	276	$(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
	277	$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
	278
	279	quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
45f0ad95	280	cmd_as_s_S = $(CPP) $(a_flags) -o $@ $<
22433fc5 MY	281
	282	$(obj)/%.s: $(src)/%.S FORCE
	283	$(call if_changed_dep,as_s_S)
	284
	285	quiet_cmd_as_o_S = AS $(quiet_modtag) $@
	286	cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
	287
	288	$(obj)/%.o: $(src)/%.S FORCE
	289	$(call if_changed_dep,as_o_S)
	290
	291	targets += $(real-objs-y) $(real-objs-m) $(lib-y)
	292	targets += $(extra-y) $(MAKECMDGOALS) $(always)
	293
	294	# Linker scripts preprocessor (.lds.S -> .lds)
	295	# ---------------------------------------------------------------------------
	296	quiet_cmd_cpp_lds_S = LDS $@
	297	cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
	298	-D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
	299
	300	$(obj)/%.lds: $(src)/%.lds.S FORCE
	301	$(call if_changed_dep,cpp_lds_S)
	302
	303	# ASN.1 grammar
	304	# ---------------------------------------------------------------------------
	305	quiet_cmd_asn1_compiler = ASN.1 $@
2b12196d	306	cmd_asn1_compiler = $(objtree)/tools/asn1_compiler $< \
22433fc5 MY	307	$(subst .h,.c,$@) $(subst .c,.h,$@)
22433fc5 MY	308
2b12196d	309	$(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/tools/asn1_compiler
22433fc5 MY	310	$(call cmd,asn1_compiler)
	311
	312	# Build the compiled-in targets
	313	# ---------------------------------------------------------------------------
	314
	315	# To build objects in subdirs, we need to descend into the directories
	316	$(sort $(subdir-obj-y)): $(subdir-ym) ;
	317
	318	#
	319	# Rule to compile a set of .o files into one .o file
	320	#
	321	ifdef builtin-target
958f2e57	322	quiet_cmd_link_o_target = AR $@
22433fc5 MY	323	# If the list of objects to link is empty, just create an empty built-in.o
22433fc5 MY	324	cmd_link_o_target = $(if $(strip $(obj-y)),\
958f2e57 MB	325	rm -f $@; $(AR) cDPrsT $@ $(filter $(obj-y), $^), \
958f2e57 MB	326	rm -f $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@)
22433fc5 MY	327
	328	$(builtin-target): $(obj-y) FORCE
	329	$(call if_changed,link_o_target)
	330
	331	targets += $(builtin-target)
	332	endif # builtin-target
	333
	334	#
	335	# Rule to create modules.order file
	336	#
	337	# Create commands to either record .ko file or cat modules.order from
	338	# a subdirectory
	339	modorder-cmds = \
	340	$(foreach m, $(modorder), \
	341	$(if $(filter %/modules.order, $m), \
	342	cat $m;, echo kernel/$m;))
	343
	344	$(modorder-target): $(subdir-ym) FORCE
	345	$(Q)(cat /dev/null; $(modorder-cmds)) > $@
	346
	347	#
	348	# Rule to compile a set of .o files into one .a file
	349	#
	350	ifdef lib-target
	351	quiet_cmd_link_l_target = AR $@
958f2e57	352	cmd_link_l_target = rm -f $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@ $(lib-y)
22433fc5 MY	353
	354	$(lib-target): $(lib-y) FORCE
	355	$(call if_changed,link_l_target)
	356
	357	targets += $(lib-target)
	358	endif
	359
958f2e57	360	quiet_cmd_link_multi-y = AR $@
473fc279	361	cmd_link_multi-y = rm -f $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@ $(filter %.o,$^)
958f2e57 MB	362
958f2e57 MB	363	quiet_cmd_link_multi-m = AR [M] $@
22433fc5 MY	364	cmd_link_multi-m = $(cmd_link_multi-y)
22433fc5 MY	365
cb6e7b0d	366	$(multi-used-y): FORCE
22433fc5	367	$(call if_changed,link_multi-y)
cb6e7b0d	368	$(call multi_depend, $(multi-used-y), .o, -objs -y)
22433fc5	369
cb6e7b0d	370	$(multi-used-m): FORCE
22433fc5	371	$(call if_changed,link_multi-m)
473fc279	372	@{ echo $(@:.o=.ko); echo $(filter %.o,$^); } > $(MODVERDIR)/$(@F:.o=.mod)
cb6e7b0d	373	$(call multi_depend, $(multi-used-m), .o, -objs -y)
22433fc5 MY	374
	375	targets += $(multi-used-y) $(multi-used-m)
	376
	377
e91610da ER	378	# Add intermediate targets:
	379	# When building objects with specific suffix patterns, add intermediate
	380	# targets that the final targets are derived from.
	381	intermediate_targets = $(foreach sfx, $(2), \
	382	$(patsubst %$(strip $(1)),%$(sfx), \
	383	$(filter %$(strip $(1)), $(targets))))
	384	# %.lex.o <- %.lex.c <- %.l
	385	# %.tab.o <- %.tab.[ch] <- %.y
e85a787c	386	targets += $(call intermediate_targets, .lex.o, .lex.c) \
e91610da ER	387	$(call intermediate_targets, .tab.o, .tab.c .tab.h)
e91610da ER	388
22433fc5 MY	389	# Descending
	390	# ---------------------------------------------------------------------------
	391
	392	PHONY += $(subdir-ym)
	393	$(subdir-ym):
	394	$(Q)$(MAKE) $(build)=$@
	395
	396	# Add FORCE to the prequisites of a target to force it to be always rebuilt.
	397	# ---------------------------------------------------------------------------
	398
	399	PHONY += FORCE
	400
	401	FORCE:
	402
	403	# Read all saved command lines and dependencies for the $(targets) we
	404	# may be building above, using $(if_changed{,_dep}). As an
	405	# optimization, we don't need to read them if the target does not
	406	# exist, we will rebuild anyway in that case.
	407
b5a20463	408	cmd_files := $(wildcard $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
22433fc5 MY	409
	410	ifneq ($(cmd_files),)
	411	include $(cmd_files)
	412	endif
	413
b5a20463 MY	414	# Create directories for object files if they do not exist
	415	obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
	416	$(shell mkdir -p $(obj-dirs))
	417
22433fc5	418	.PHONY: $(PHONY)