[net-next-2.6.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 .config if it exist, otherwise ignore
-include include/config/auto.conf

include scripts/Kbuild.include

# For backward compatibility check that these variables does 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 unles 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	   = \
		$(CPP) -D__GENKSYMS__ $(c_flags) $<			\
		| $(GENKSYMS) -T $@ >/dev/null;				\
		test -s $@ || rm -f $@

$(obj)/%.symtypes : $(src)/%.c FORCE
	$(call if_changed_dep,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 $(@D)/$(@F:.o=.symtypes)) -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

define rule_cc_o_c
	$(call echo-cmd,checksrc) $(cmd_checksrc)			  \
	$(call echo-cmd,cc_o_c) $(cmd_cc_o_c);				  \
	$(cmd_modversions)						  \
	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
1da177e4	30	# Read .config if it exist, otherwise ignore
c955ccaf	31	-include include/config/auto.conf
1da177e4	32
20a468b5 SR	33	include scripts/Kbuild.include
20a468b5 SR	34
0c53c8e6 SR	35	# For backward compatibility check that these variables does not change
	36	save-cflags := $(CFLAGS)
	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 += $(host-progs)
	55	endif
	56	endif
	57
	58	# Do not include host rules unles needed
	59	ifneq ($(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) $@
	155	cmd_cc_symtypes_c = \
	156	$(CPP) -D__GENKSYMS__ $(c_flags) $< \
	157	\| $(GENKSYMS) -T $@ >/dev/null; \
	158	test -s $@ \|\| rm -f $@
	159
767e581d	160	$(obj)/%.symtypes : $(src)/%.c FORCE
15fde675 AG	161	$(call if_changed_dep,cc_symtypes_c)
15fde675 AG	162
1da177e4 LT	163	# C (.c) files
	164	# The C file is compiled and updated dependency information is generated.
	165	# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
	166
	167	quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
	168
	169	ifndef CONFIG_MODVERSIONS
	170	cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
	171
	172	else
	173	# When module versioning is enabled the following steps are executed:
	174	# o compile a .tmp_<file>.o from <file>.c
	175	# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
	176	# not export symbols, we just rename .tmp_<file>.o to <file>.o and
	177	# are done.
	178	# o otherwise, we calculate symbol versions using the good old
	179	# genksyms on the preprocessed source and postprocess them in a way
	180	# that they are usable as a linker script
	181	# o generate <file>.o from .tmp_<file>.o using the linker to
	182	# replace the unresolved symbols __crc_exported_symbol with
	183	# the actual value of the checksum generated by genksyms
	184
	185	cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
	186	cmd_modversions = \
	187	if $(OBJDUMP) -h $(@D)/.tmp_$(@F) \| grep -q __ksymtab; then \
	188	$(CPP) -D__GENKSYMS__ $(c_flags) $< \
15fde675 AG	189	\| $(GENKSYMS) $(if $(KBUILD_SYMTYPES), \
15fde675 AG	190	-T $(@D)/$(@F:.o=.symtypes)) -a $(ARCH) \
1da177e4 LT	191	> $(@D)/.tmp_$(@F:.o=.ver); \
	192	\
	193	$(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
	194	-T $(@D)/.tmp_$(@F:.o=.ver); \
	195	rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
	196	else \
cfca82f2	197	mv -f $(@D)/.tmp_$(@F) $@; \
1da177e4 LT	198	fi;
	199	endif
	200
	201	define rule_cc_o_c
6176aa9a JB	202	$(call echo-cmd,checksrc) $(cmd_checksrc) \
6176aa9a JB	203	$(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \
1da177e4	204	$(cmd_modversions) \
48f1f058 SR	205	scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \
48f1f058 SR	206	$(dot-target).tmp; \
1da177e4	207	rm -f $(depfile); \
48f1f058	208	mv -f $(dot-target).tmp $(dot-target).cmd
1da177e4 LT	209	endef
	210
	211	# Built-in and composite module parts
767e581d	212	$(obj)/%.o: $(src)/%.c FORCE
1da177e4 LT	213	$(call cmd,force_checksrc)
	214	$(call if_changed_rule,cc_o_c)
	215
	216	# Single-part modules are special since we need to mark them in $(MODVERDIR)
	217
767e581d	218	$(single-used-m): $(obj)/%.o: $(src)/%.c FORCE
1da177e4 LT	219	$(call cmd,force_checksrc)
	220	$(call if_changed_rule,cc_o_c)
	221	@{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)
	222
	223	quiet_cmd_cc_lst_c = MKLST $@
	224	cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
	225	$(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
	226	System.map $(OBJDUMP) > $@
	227
767e581d	228	$(obj)/%.lst: $(src)/%.c FORCE
1da177e4 LT	229	$(call if_changed_dep,cc_lst_c)
	230
	231	# Compile assembler sources (.S)
	232	# ---------------------------------------------------------------------------
	233
	234	modkern_aflags := $(AFLAGS_KERNEL)
	235
	236	$(real-objs-m) : modkern_aflags := $(AFLAGS_MODULE)
	237	$(real-objs-m:.o=.s): modkern_aflags := $(AFLAGS_MODULE)
	238
	239	quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
	240	cmd_as_s_S = $(CPP) $(a_flags) -o $@ $<
	241
767e581d	242	$(obj)/%.s: $(src)/%.S FORCE
1da177e4 LT	243	$(call if_changed_dep,as_s_S)
	244
	245	quiet_cmd_as_o_S = AS $(quiet_modtag) $@
	246	cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
	247
767e581d	248	$(obj)/%.o: $(src)/%.S FORCE
1da177e4 LT	249	$(call if_changed_dep,as_o_S)
	250
	251	targets += $(real-objs-y) $(real-objs-m) $(lib-y)
	252	targets += $(extra-y) $(MAKECMDGOALS) $(always)
	253
	254	# Linker scripts preprocessor (.lds.S -> .lds)
	255	# ---------------------------------------------------------------------------
	256	quiet_cmd_cpp_lds_S = LDS $@
	257	cmd_cpp_lds_S = $(CPP) $(cpp_flags) -D__ASSEMBLY__ -o $@ $<
	258
767e581d	259	$(obj)/%.lds: $(src)/%.lds.S FORCE
1da177e4 LT	260	$(call if_changed_dep,cpp_lds_S)
	261
	262	# Build the compiled-in targets
	263	# ---------------------------------------------------------------------------
	264
	265	# To build objects in subdirs, we need to descend into the directories
	266	$(sort $(subdir-obj-y)): $(subdir-ym) ;
	267
	268	#
	269	# Rule to compile a set of .o files into one .o file
	270	#
	271	ifdef builtin-target
	272	quiet_cmd_link_o_target = LD $@
	273	# If the list of objects to link is empty, just create an empty built-in.o
	274	cmd_link_o_target = $(if $(strip $(obj-y)),\
91341d4b SR	275	$(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \
91341d4b SR	276	$(cmd_secanalysis),\
1da177e4 LT	277	rm -f $@; $(AR) rcs $@)
	278
	279	$(builtin-target): $(obj-y) FORCE
	280	$(call if_changed,link_o_target)
	281
	282	targets += $(builtin-target)
	283	endif # builtin-target
	284
551559e1 TH	285	#
	286	# Rule to create modules.order file
	287	#
	288	# Create commands to either record .ko file or cat modules.order from
	289	# a subdirectory
	290	modorder-cmds = \
	291	$(foreach m, $(modorder), \
	292	$(if $(filter %/modules.order, $m), \
	293	cat $m;, echo kernel/$m;))
	294
	295	$(modorder-target): $(subdir-ym) FORCE
	296	$(Q)(cat /dev/null; $(modorder-cmds)) > $@
	297
1da177e4 LT	298	#
	299	# Rule to compile a set of .o files into one .a file
	300	#
	301	ifdef lib-target
	302	quiet_cmd_link_l_target = AR $@
5e54d5e5	303	cmd_link_l_target = rm -f $@; $(AR) rcs $@ $(lib-y)
1da177e4 LT	304
	305	$(lib-target): $(lib-y) FORCE
	306	$(call if_changed,link_l_target)
	307
	308	targets += $(lib-target)
	309	endif
	310
	311	#
	312	# Rule to link composite objects
	313	#
	314	# Composite objects are specified in kbuild makefile as follows:
	315	# <composite-object>-objs := <list of .o files>
	316	# or
	317	# <composite-object>-y := <list of .o files>
	318	link_multi_deps = \
	319	$(filter $(addprefix $(obj)/, \
	320	$($(subst $(obj)/,,$(@:.o=-objs))) \
	321	$($(subst $(obj)/,,$(@:.o=-y)))), $^)
	322
	323	quiet_cmd_link_multi-y = LD $@
91341d4b	324	cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
1da177e4 LT	325
1da177e4 LT	326	quiet_cmd_link_multi-m = LD [M] $@
114f5157	327	cmd_link_multi-m = $(cmd_link_multi-y)
1da177e4 LT	328
	329	# We would rather have a list of rules like
	330	# foo.o: $(foo-objs)
	331	# but that's not so easy, so we rather make all composite objects depend
	332	# on the set of all their parts
	333	$(multi-used-y) : %.o: $(multi-objs-y) FORCE
	334	$(call if_changed,link_multi-y)
	335
	336	$(multi-used-m) : %.o: $(multi-objs-m) FORCE
	337	$(call if_changed,link_multi-m)
	338	@{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod)
	339
	340	targets += $(multi-used-y) $(multi-used-m)
	341
	342
	343	# Descending
	344	# ---------------------------------------------------------------------------
	345
4f193362	346	PHONY += $(subdir-ym)
1da177e4 LT	347	$(subdir-ym):
	348	$(Q)$(MAKE) $(build)=$@
	349
	350	# Add FORCE to the prequisites of a target to force it to be always rebuilt.
	351	# ---------------------------------------------------------------------------
	352
4f193362	353	PHONY += FORCE
1da177e4 LT	354
	355	FORCE:
	356
	357	# Read all saved command lines and dependencies for the $(targets) we
	358	# may be building above, using $(if_changed{,_dep}). As an
	359	# optimization, we don't need to read them if the target does not
	360	# exist, we will rebuild anyway in that case.
	361
	362	targets := $(wildcard $(sort $(targets)))
	363	cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
	364
	365	ifneq ($(cmd_files),)
	366	include $(cmd_files)
	367	endif
4f193362 PS	368
	369
	370	# Declare the contents of the .PHONY variable as phony. We keep that
	371	# information in a variable se we can use it in if_changed and friends.
	372
	373	.PHONY: $(PHONY)