[GitHub/mt8127/android_kernel_alcatel_ttab.git] / scripts / Makefile.build

# ==========================================================================
# Building
# ==========================================================================

src := $(obj)

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  :=

# Read auto.conf if it exists, otherwise ignore
-include include/config/auto.conf

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)

# 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 EXTRA_CFLAGS)
        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

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-n) $(lib-)),)
lib-target := $(obj)/lib.a
endif

ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(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 := $(CFLAGS_KERNEL)
quiet_modtag := $(empty)   $(empty)

$(real-objs-m)        : modkern_cflags := $(CFLAGS_MODULE)
$(real-objs-m:.o=.i)  : modkern_cflags := $(CFLAGS_MODULE)
$(real-objs-m:.o=.s)  : modkern_cflags := $(CFLAGS_MODULE)
$(real-objs-m:.o=.lst): modkern_cflags := $(CFLAGS_MODULE)

$(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) -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)

quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
cmd_cc_symtypes_c	   = \
		set -e;							\
		$(CPP) -D__GENKSYMS__ $(c_flags) $<			\
		| $(GENKSYMS) -T $@					\
			      -r $(firstword $(wildcard			\
				     $(@:.symtypes=.symref) /dev/null))	\
			      $(if $(KBUILD_PRESERVE),-p)		\
			      -a $(ARCH)				\
		  >/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	\
		$(CPP) -D__GENKSYMS__ $(c_flags) $<			\
		| $(GENKSYMS) $(if $(KBUILD_SYMTYPES),			\
			           -T $(@:.o=.symtypes))		\
			      -r $(firstword $(wildcard			\
				     $(@:.o=.symref) /dev/null))	\
			      $(if $(KBUILD_PRESERVE),-p)		\
			      -a $(ARCH)				\
		> $(@D)/.tmp_$(@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_64BIT
arch_bits = 64
else
arch_bits = 32
endif

ifdef CONFIG_FTRACE_MCOUNT_RECORD
cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl \
	"$(ARCH)" "$(arch_bits)" "$(OBJDUMP)" "$(OBJCOPY)" "$(CC)" "$(LD)" \
	"$(NM)" "$(RM)" "$(MV)" "$(@)";
endif

define rule_cc_o_c
	$(call echo-cmd,checksrc) $(cmd_checksrc)			  \
	$(call echo-cmd,cc_o_c) $(cmd_cc_o_c);				  \
	$(cmd_modversions)						  \
	$(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 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 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 := $(AFLAGS_KERNEL)

$(real-objs-m)      : modkern_aflags := $(AFLAGS_MODULE)
$(real-objs-m:.o=.s): modkern_aflags := $(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) -D__ASSEMBLY__ -o $@ $<

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

# 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 $@)

$(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 $@ $(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)

# We would rather have a list of rules like
# 	foo.o: $(foo-objs)
# but that's not so easy, so we rather make all composite objects depend
# on the set of all their parts
$(multi-used-y) : %.o: $(multi-objs-y) FORCE
	$(call if_changed,link_multi-y)

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

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
1da177e4 LT	1	# ==========================================================================
	2	# Building
	3	# ==========================================================================
	4
	5	src := $(obj)
	6
4f193362	7	PHONY := __build
1da177e4 LT	8	__build:
1da177e4 LT	9
d72e5edb SR	10	# Init all relevant variables used in kbuild files so
	11	# 1) they have correct type
	12	# 2) they do not inherit any value from the environment
	13	obj-y :=
	14	obj-m :=
	15	lib-y :=
	16	lib-m :=
	17	always :=
	18	targets :=
	19	subdir-y :=
	20	subdir-m :=
	21	EXTRA_AFLAGS :=
	22	EXTRA_CFLAGS :=
	23	EXTRA_CPPFLAGS :=
	24	EXTRA_LDFLAGS :=
f77bf014 SR	25	asflags-y :=
	26	ccflags-y :=
	27	cppflags-y :=
	28	ldflags-y :=
d72e5edb	29
3156fd05	30	# Read auto.conf if it exists, otherwise ignore
c955ccaf	31	-include include/config/auto.conf
1da177e4	32
20a468b5 SR	33	include scripts/Kbuild.include
20a468b5 SR	34
3156fd05	35	# For backward compatibility check that these variables do not change
0c53c8e6 SR	36	save-cflags := $(CFLAGS)
0c53c8e6 SR	37
2a691470	38	# The filename Kbuild has precedence over Makefile
db8c1a7b	39	kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
0c53c8e6 SR	40	kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
	41	include $(kbuild-file)
	42
	43	# If the save-* variables changed error out
	44	ifeq ($(KBUILD_NOPEDANTIC),)
	45	ifneq ("$(save-cflags)","$(CFLAGS)")
	46	$(error CFLAGS was changed in "$(kbuild-file)". Fix it to use EXTRA_CFLAGS)
	47	endif
	48	endif
1da177e4 LT	49	include scripts/Makefile.lib
	50
	51	ifdef host-progs
	52	ifneq ($(hostprogs-y),$(host-progs))
	53	$(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!)
	54	hostprogs-y += $(host-progs)
	55	endif
	56	endif
	57
3156fd05	58	# Do not include host rules unless needed
1da177e4 LT	59	ifneq ($(hostprogs-y)$(hostprogs-m),)
	60	include scripts/Makefile.host
	61	endif
	62
	63	ifneq ($(KBUILD_SRC),)
	64	# Create output directory if not already present
	65	_dummy := $(shell [ -d $(obj) ] \|\| mkdir -p $(obj))
	66
	67	# Create directories for object files if directory does not exist
	68	# Needed when obj-y := dir/file.o syntax is used
	69	_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] \|\| mkdir -p $(d)))
	70	endif
	71
1da177e4 LT	72	ifndef obj
	73	$(warning kbuild: Makefile.build is included improperly)
	74	endif
	75
	76	# ===========================================================================
	77
	78	ifneq ($(strip $(lib-y) $(lib-m) $(lib-n) $(lib-)),)
	79	lib-target := $(obj)/lib.a
	80	endif
	81
	82	ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(lib-target)),)
	83	builtin-target := $(obj)/built-in.o
	84	endif
	85
551559e1 TH	86	modorder-target := $(obj)/modules.order
551559e1 TH	87
1da177e4 LT	88	# We keep a list of all modules in $(MODVERDIR)
	89
	90	__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
551559e1	91	$(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
1da177e4 LT	92	$(subdir-ym) $(always)
	93	@:
	94
	95	# Linus' kernel sanity checking tool
	96	ifneq ($(KBUILD_CHECKSRC),0)
	97	ifeq ($(KBUILD_CHECKSRC),2)
	98	quiet_cmd_force_checksrc = CHECK $<
	99	cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
	100	else
	101	quiet_cmd_checksrc = CHECK $<
	102	cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
	103	endif
	104	endif
	105
91341d4b SR	106	# Do section mismatch analysis for each module/built-in.o
	107	ifdef CONFIG_DEBUG_SECTION_MISMATCH
	108	cmd_secanalysis = ; scripts/mod/modpost $@
	109	endif
1da177e4 LT	110
	111	# Compile C sources (.c)
	112	# ---------------------------------------------------------------------------
	113
	114	# Default is built-in, unless we know otherwise
	115	modkern_cflags := $(CFLAGS_KERNEL)
	116	quiet_modtag := $(empty) $(empty)
	117
	118	$(real-objs-m) : modkern_cflags := $(CFLAGS_MODULE)
	119	$(real-objs-m:.o=.i) : modkern_cflags := $(CFLAGS_MODULE)
	120	$(real-objs-m:.o=.s) : modkern_cflags := $(CFLAGS_MODULE)
	121	$(real-objs-m:.o=.lst): modkern_cflags := $(CFLAGS_MODULE)
	122
	123	$(real-objs-m) : quiet_modtag := [M]
	124	$(real-objs-m:.o=.i) : quiet_modtag := [M]
	125	$(real-objs-m:.o=.s) : quiet_modtag := [M]
	126	$(real-objs-m:.o=.lst): quiet_modtag := [M]
	127
	128	$(obj-m) : quiet_modtag := [M]
	129
	130	# Default for not multi-part modules
5e8d780d	131	modname = $(basetarget)
1da177e4 LT	132
	133	$(multi-objs-m) : modname = $(modname-multi)
	134	$(multi-objs-m:.o=.i) : modname = $(modname-multi)
	135	$(multi-objs-m:.o=.s) : modname = $(modname-multi)
	136	$(multi-objs-m:.o=.lst) : modname = $(modname-multi)
	137	$(multi-objs-y) : modname = $(modname-multi)
	138	$(multi-objs-y:.o=.i) : modname = $(modname-multi)
	139	$(multi-objs-y:.o=.s) : modname = $(modname-multi)
	140	$(multi-objs-y:.o=.lst) : modname = $(modname-multi)
	141
	142	quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
7d185983	143	cmd_cc_s_c = $(CC) $(c_flags) -fverbose-asm -S -o $@ $<
1da177e4	144
767e581d	145	$(obj)/%.s: $(src)/%.c FORCE
1da177e4 LT	146	$(call if_changed_dep,cc_s_c)
	147
	148	quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@
	149	cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $<
	150
767e581d	151	$(obj)/%.i: $(src)/%.c FORCE
1da177e4 LT	152	$(call if_changed_dep,cc_i_c)
1da177e4 LT	153
15fde675 AG	154	quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
15fde675 AG	155	cmd_cc_symtypes_c = \
64e6c1e1	156	set -e; \
15fde675	157	$(CPP) -D__GENKSYMS__ $(c_flags) $< \
64e6c1e1 AG	158	\| $(GENKSYMS) -T $@ \
	159	-r $(firstword $(wildcard \
	160	$(@:.symtypes=.symref) /dev/null)) \
	161	$(if $(KBUILD_PRESERVE),-p) \
	162	-a $(ARCH) \
	163	>/dev/null; \
15fde675 AG	164	test -s $@ \|\| rm -f $@
15fde675 AG	165
767e581d	166	$(obj)/%.symtypes : $(src)/%.c FORCE
64e6c1e1	167	$(call cmd,cc_symtypes_c)
15fde675	168
1da177e4 LT	169	# C (.c) files
	170	# The C file is compiled and updated dependency information is generated.
	171	# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
	172
	173	quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
	174
	175	ifndef CONFIG_MODVERSIONS
	176	cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
	177
	178	else
	179	# When module versioning is enabled the following steps are executed:
	180	# o compile a .tmp_<file>.o from <file>.c
	181	# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
	182	# not export symbols, we just rename .tmp_<file>.o to <file>.o and
	183	# are done.
	184	# o otherwise, we calculate symbol versions using the good old
	185	# genksyms on the preprocessed source and postprocess them in a way
	186	# that they are usable as a linker script
	187	# o generate <file>.o from .tmp_<file>.o using the linker to
	188	# replace the unresolved symbols __crc_exported_symbol with
	189	# the actual value of the checksum generated by genksyms
	190
	191	cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
	192	cmd_modversions = \
	193	if $(OBJDUMP) -h $(@D)/.tmp_$(@F) \| grep -q __ksymtab; then \
	194	$(CPP) -D__GENKSYMS__ $(c_flags) $< \
15fde675	195	\| $(GENKSYMS) $(if $(KBUILD_SYMTYPES), \
64e6c1e1 AG	196	-T $(@:.o=.symtypes)) \
	197	-r $(firstword $(wildcard \
	198	$(@:.o=.symref) /dev/null)) \
	199	$(if $(KBUILD_PRESERVE),-p) \
	200	-a $(ARCH) \
1da177e4 LT	201	> $(@D)/.tmp_$(@F:.o=.ver); \
	202	\
	203	$(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
	204	-T $(@D)/.tmp_$(@F:.o=.ver); \
	205	rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
	206	else \
cfca82f2	207	mv -f $(@D)/.tmp_$(@F) $@; \
1da177e4 LT	208	fi;
	209	endif
	210
dce9d18a SR	211	ifdef CONFIG_64BIT
	212	arch_bits = 64
	213	else
	214	arch_bits = 32
	215	endif
	216
8da3821b	217	ifdef CONFIG_FTRACE_MCOUNT_RECORD
b3a32041	218	cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl \
dce9d18a SR	219	"$(ARCH)" "$(arch_bits)" "$(OBJDUMP)" "$(OBJCOPY)" "$(CC)" "$(LD)" \
dce9d18a SR	220	"$(NM)" "$(RM)" "$(MV)" "$(@)";
8da3821b SR	221	endif
8da3821b SR	222
1da177e4	223	define rule_cc_o_c
6176aa9a JB	224	$(call echo-cmd,checksrc) $(cmd_checksrc) \
6176aa9a JB	225	$(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \
1da177e4	226	$(cmd_modversions) \
8da3821b	227	$(cmd_record_mcount) \
48f1f058 SR	228	scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \
48f1f058 SR	229	$(dot-target).tmp; \
1da177e4	230	rm -f $(depfile); \
48f1f058	231	mv -f $(dot-target).tmp $(dot-target).cmd
1da177e4 LT	232	endef
	233
	234	# Built-in and composite module parts
767e581d	235	$(obj)/%.o: $(src)/%.c FORCE
1da177e4 LT	236	$(call cmd,force_checksrc)
	237	$(call if_changed_rule,cc_o_c)
	238
	239	# Single-part modules are special since we need to mark them in $(MODVERDIR)
	240
767e581d	241	$(single-used-m): $(obj)/%.o: $(src)/%.c FORCE
1da177e4 LT	242	$(call cmd,force_checksrc)
	243	$(call if_changed_rule,cc_o_c)
	244	@{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)
	245
	246	quiet_cmd_cc_lst_c = MKLST $@
	247	cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
	248	$(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
	249	System.map $(OBJDUMP) > $@
	250
767e581d	251	$(obj)/%.lst: $(src)/%.c FORCE
1da177e4 LT	252	$(call if_changed_dep,cc_lst_c)
	253
	254	# Compile assembler sources (.S)
	255	# ---------------------------------------------------------------------------
	256
	257	modkern_aflags := $(AFLAGS_KERNEL)
	258
	259	$(real-objs-m) : modkern_aflags := $(AFLAGS_MODULE)
	260	$(real-objs-m:.o=.s): modkern_aflags := $(AFLAGS_MODULE)
	261
	262	quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
	263	cmd_as_s_S = $(CPP) $(a_flags) -o $@ $<
	264
767e581d	265	$(obj)/%.s: $(src)/%.S FORCE
1da177e4 LT	266	$(call if_changed_dep,as_s_S)
	267
	268	quiet_cmd_as_o_S = AS $(quiet_modtag) $@
	269	cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
	270
767e581d	271	$(obj)/%.o: $(src)/%.S FORCE
1da177e4 LT	272	$(call if_changed_dep,as_o_S)
	273
	274	targets += $(real-objs-y) $(real-objs-m) $(lib-y)
	275	targets += $(extra-y) $(MAKECMDGOALS) $(always)
	276
	277	# Linker scripts preprocessor (.lds.S -> .lds)
	278	# ---------------------------------------------------------------------------
	279	quiet_cmd_cpp_lds_S = LDS $@
	280	cmd_cpp_lds_S = $(CPP) $(cpp_flags) -D__ASSEMBLY__ -o $@ $<
	281
767e581d	282	$(obj)/%.lds: $(src)/%.lds.S FORCE
1da177e4 LT	283	$(call if_changed_dep,cpp_lds_S)
	284
	285	# Build the compiled-in targets
	286	# ---------------------------------------------------------------------------
	287
	288	# To build objects in subdirs, we need to descend into the directories
	289	$(sort $(subdir-obj-y)): $(subdir-ym) ;
	290
	291	#
	292	# Rule to compile a set of .o files into one .o file
	293	#
	294	ifdef builtin-target
	295	quiet_cmd_link_o_target = LD $@
	296	# If the list of objects to link is empty, just create an empty built-in.o
	297	cmd_link_o_target = $(if $(strip $(obj-y)),\
91341d4b SR	298	$(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \
91341d4b SR	299	$(cmd_secanalysis),\
1da177e4 LT	300	rm -f $@; $(AR) rcs $@)
	301
	302	$(builtin-target): $(obj-y) FORCE
	303	$(call if_changed,link_o_target)
	304
	305	targets += $(builtin-target)
	306	endif # builtin-target
	307
551559e1 TH	308	#
	309	# Rule to create modules.order file
	310	#
	311	# Create commands to either record .ko file or cat modules.order from
	312	# a subdirectory
	313	modorder-cmds = \
	314	$(foreach m, $(modorder), \
	315	$(if $(filter %/modules.order, $m), \
	316	cat $m;, echo kernel/$m;))
	317
	318	$(modorder-target): $(subdir-ym) FORCE
	319	$(Q)(cat /dev/null; $(modorder-cmds)) > $@
	320
1da177e4 LT	321	#
	322	# Rule to compile a set of .o files into one .a file
	323	#
	324	ifdef lib-target
	325	quiet_cmd_link_l_target = AR $@
5e54d5e5	326	cmd_link_l_target = rm -f $@; $(AR) rcs $@ $(lib-y)
1da177e4 LT	327
	328	$(lib-target): $(lib-y) FORCE
	329	$(call if_changed,link_l_target)
	330
	331	targets += $(lib-target)
	332	endif
	333
	334	#
	335	# Rule to link composite objects
	336	#
	337	# Composite objects are specified in kbuild makefile as follows:
	338	# <composite-object>-objs := <list of .o files>
	339	# or
	340	# <composite-object>-y := <list of .o files>
	341	link_multi_deps = \
	342	$(filter $(addprefix $(obj)/, \
	343	$($(subst $(obj)/,,$(@:.o=-objs))) \
	344	$($(subst $(obj)/,,$(@:.o=-y)))), $^)
	345
	346	quiet_cmd_link_multi-y = LD $@
91341d4b	347	cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
1da177e4 LT	348
1da177e4 LT	349	quiet_cmd_link_multi-m = LD [M] $@
114f5157	350	cmd_link_multi-m = $(cmd_link_multi-y)
1da177e4 LT	351
	352	# We would rather have a list of rules like
	353	# foo.o: $(foo-objs)
	354	# but that's not so easy, so we rather make all composite objects depend
	355	# on the set of all their parts
	356	$(multi-used-y) : %.o: $(multi-objs-y) FORCE
	357	$(call if_changed,link_multi-y)
	358
	359	$(multi-used-m) : %.o: $(multi-objs-m) FORCE
	360	$(call if_changed,link_multi-m)
	361	@{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod)
	362
	363	targets += $(multi-used-y) $(multi-used-m)
	364
	365
	366	# Descending
	367	# ---------------------------------------------------------------------------
	368
4f193362	369	PHONY += $(subdir-ym)
1da177e4 LT	370	$(subdir-ym):
	371	$(Q)$(MAKE) $(build)=$@
	372
	373	# Add FORCE to the prequisites of a target to force it to be always rebuilt.
	374	# ---------------------------------------------------------------------------
	375
4f193362	376	PHONY += FORCE
1da177e4 LT	377
	378	FORCE:
	379
	380	# Read all saved command lines and dependencies for the $(targets) we
	381	# may be building above, using $(if_changed{,_dep}). As an
	382	# optimization, we don't need to read them if the target does not
	383	# exist, we will rebuild anyway in that case.
	384
	385	targets := $(wildcard $(sort $(targets)))
	386	cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
	387
	388	ifneq ($(cmd_files),)
	389	include $(cmd_files)
	390	endif
4f193362 PS	391
	392
	393	# Declare the contents of the .PHONY variable as phony. We keep that
	394	# information in a variable se we can use it in if_changed and friends.
	395
	396	.PHONY: $(PHONY)