[people/ms/u-boot.git] / scripts / Makefile.build

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

# Modified for U-Boot
ifeq ($(CONFIG_TPL_BUILD),y)
  src := $(patsubst tpl/%,%,$(obj))
else
  ifeq ($(CONFIG_SPL_BUILD),y)
    src := $(patsubst spl/%,%,$(obj))
  else
    src := $(obj)
  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
-include include/config/auto.conf

# Added for U-Boot: Load U-Boot configuration
ifeq ($(CONFIG_TPL_BUILD),y)
  -include include/tpl-autoconf.mk
else
  ifeq ($(CONFIG_SPL_BUILD),y)
    -include include/spl-autoconf.mk
  else
    -include include/autoconf.mk
  endif
endif

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

#
# make W=... settings
#
# W=1 - warnings that may be relevant and does not occur too often
# W=2 - warnings that occur quite often but may still be relevant
# W=3 - the more obscure warnings, can most likely be ignored
#
# $(call cc-option, -W...) handles gcc -W.. options which
# are not supported by all versions of the compiler
ifdef KBUILD_ENABLE_EXTRA_GCC_CHECKS
warning-  := $(empty)

warning-1 := -Wextra -Wunused -Wno-unused-parameter
warning-1 += -Wmissing-declarations
warning-1 += -Wmissing-format-attribute
warning-1 += -Wmissing-prototypes
warning-1 += -Wold-style-definition
warning-1 += $(call cc-option, -Wmissing-include-dirs)
warning-1 += $(call cc-option, -Wunused-but-set-variable)
warning-1 += $(call cc-disable-warning, missing-field-initializers)

warning-2 := -Waggregate-return
warning-2 += -Wcast-align
warning-2 += -Wdisabled-optimization
warning-2 += -Wnested-externs
warning-2 += -Wshadow
warning-2 += $(call cc-option, -Wlogical-op)
warning-2 += $(call cc-option, -Wmissing-field-initializers)

warning-3 := -Wbad-function-cast
warning-3 += -Wcast-qual
warning-3 += -Wconversion
warning-3 += -Wpacked
warning-3 += -Wpadded
warning-3 += -Wpointer-arith
warning-3 += -Wredundant-decls
warning-3 += -Wswitch-default
warning-3 += $(call cc-option, -Wpacked-bitfield-compat)
warning-3 += $(call cc-option, -Wvla)

warning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
warning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
warning += $(warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))

ifeq ("$(strip $(warning))","")
        $(error W=$(KBUILD_ENABLE_EXTRA_GCC_CHECKS) is unknown)
endif

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

ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(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) -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 -pg,$(_c_flags))" = "-pg" ]; 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)

# 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: $(PHONY)
Commit	Line	Data
22433fc5 MY	1	# ==========================================================================
	2	# Building
	3	# ==========================================================================
	4
6825a95b MY	5	# Modified for U-Boot
	6	ifeq ($(CONFIG_TPL_BUILD),y)
	7	src := $(patsubst tpl/%,%,$(obj))
	8	else
	9	ifeq ($(CONFIG_SPL_BUILD),y)
	10	src := $(patsubst spl/%,%,$(obj))
	11	else
	12	src := $(obj)
	13	endif
	14	endif
22433fc5 MY	15
	16	PHONY := __build
	17	__build:
	18
	19	# Init all relevant variables used in kbuild files so
	20	# 1) they have correct type
	21	# 2) they do not inherit any value from the environment
	22	obj-y :=
	23	obj-m :=
	24	lib-y :=
	25	lib-m :=
	26	always :=
	27	targets :=
	28	subdir-y :=
	29	subdir-m :=
	30	EXTRA_AFLAGS :=
	31	EXTRA_CFLAGS :=
	32	EXTRA_CPPFLAGS :=
	33	EXTRA_LDFLAGS :=
	34	asflags-y :=
	35	ccflags-y :=
	36	cppflags-y :=
	37	ldflags-y :=
	38
	39	subdir-asflags-y :=
	40	subdir-ccflags-y :=
	41
	42	# Read auto.conf if it exists, otherwise ignore
	43	-include include/config/auto.conf
	44
01072b44 MY	45	# Added for U-Boot: Load U-Boot configuration
	46	ifeq ($(CONFIG_TPL_BUILD),y)
	47	-include include/tpl-autoconf.mk
	48	else
	49	ifeq ($(CONFIG_SPL_BUILD),y)
	50	-include include/spl-autoconf.mk
	51	else
	52	-include include/autoconf.mk
	53	endif
	54	endif
	55
22433fc5 MY	56	include scripts/Kbuild.include
	57
	58	# For backward compatibility check that these variables do not change
	59	save-cflags := $(CFLAGS)
	60
	61	# The filename Kbuild has precedence over Makefile
	62	kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
	63	kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
	64	include $(kbuild-file)
	65
026f9cf2 MY	66	# Added for U-Boot
	67	asflags-y += $(PLATFORM_CPPFLAGS)
	68	ccflags-y += $(PLATFORM_CPPFLAGS)
	69	cppflags-y += $(PLATFORM_CPPFLAGS)
	70
22433fc5 MY	71	# If the save-* variables changed error out
	72	ifeq ($(KBUILD_NOPEDANTIC),)
	73	ifneq ("$(save-cflags)","$(CFLAGS)")
	74	$(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y)
	75	endif
	76	endif
	77
	78	#
	79	# make W=... settings
	80	#
	81	# W=1 - warnings that may be relevant and does not occur too often
	82	# W=2 - warnings that occur quite often but may still be relevant
	83	# W=3 - the more obscure warnings, can most likely be ignored
	84	#
	85	# $(call cc-option, -W...) handles gcc -W.. options which
	86	# are not supported by all versions of the compiler
	87	ifdef KBUILD_ENABLE_EXTRA_GCC_CHECKS
	88	warning- := $(empty)
	89
	90	warning-1 := -Wextra -Wunused -Wno-unused-parameter
	91	warning-1 += -Wmissing-declarations
	92	warning-1 += -Wmissing-format-attribute
	93	warning-1 += -Wmissing-prototypes
	94	warning-1 += -Wold-style-definition
	95	warning-1 += $(call cc-option, -Wmissing-include-dirs)
	96	warning-1 += $(call cc-option, -Wunused-but-set-variable)
	97	warning-1 += $(call cc-disable-warning, missing-field-initializers)
	98
	99	warning-2 := -Waggregate-return
	100	warning-2 += -Wcast-align
	101	warning-2 += -Wdisabled-optimization
	102	warning-2 += -Wnested-externs
	103	warning-2 += -Wshadow
	104	warning-2 += $(call cc-option, -Wlogical-op)
	105	warning-2 += $(call cc-option, -Wmissing-field-initializers)
	106
	107	warning-3 := -Wbad-function-cast
	108	warning-3 += -Wcast-qual
	109	warning-3 += -Wconversion
	110	warning-3 += -Wpacked
	111	warning-3 += -Wpadded
	112	warning-3 += -Wpointer-arith
	113	warning-3 += -Wredundant-decls
	114	warning-3 += -Wswitch-default
	115	warning-3 += $(call cc-option, -Wpacked-bitfield-compat)
	116	warning-3 += $(call cc-option, -Wvla)
	117
	118	warning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
	119	warning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
	120	warning += $(warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
	121
	122	ifeq ("$(strip $(warning))","")
	123	$(error W=$(KBUILD_ENABLE_EXTRA_GCC_CHECKS) is unknown)
	124	endif
	125
	126	KBUILD_CFLAGS += $(warning)
	127	endif
	128
	129	include scripts/Makefile.lib
	130
	131	ifdef host-progs
	132	ifneq ($(hostprogs-y),$(host-progs))
	133	$(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!)
	134	hostprogs-y += $(host-progs)
135	endif
136	endif
137
138	# Do not include host rules unless needed
139	ifneq ($(hostprogs-y)$(hostprogs-m),)
140	include scripts/Makefile.host
141	endif
142
6825a95b MY	143	# Uncommented for U-Boot
	144	# We need to create output dicrectory for SPL and TPL even for in-tree build
	145	#ifneq ($(KBUILD_SRC),)
22433fc5 MY	146	# Create output directory if not already present
	147	_dummy := $(shell [ -d $(obj) ] \|\| mkdir -p $(obj))
	148
	149	# Create directories for object files if directory does not exist
	150	# Needed when obj-y := dir/file.o syntax is used
	151	_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] \|\| mkdir -p $(d)))
6825a95b	152	#endif
22433fc5 MY	153
	154	ifndef obj
	155	$(warning kbuild: Makefile.build is included improperly)
	156	endif
	157
	158	# ===========================================================================
	159
	160	ifneq ($(strip $(lib-y) $(lib-m) $(lib-n) $(lib-)),)
	161	lib-target := $(obj)/lib.a
	162	endif
	163
	164	ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(subdir-m) $(lib-target)),)
	165	builtin-target := $(obj)/built-in.o
	166	endif
	167
	168	modorder-target := $(obj)/modules.order
	169
	170	# We keep a list of all modules in $(MODVERDIR)
	171
	172	__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
	173	$(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
	174	$(subdir-ym) $(always)
	175	@:
	176
	177	# Linus' kernel sanity checking tool
	178	ifneq ($(KBUILD_CHECKSRC),0)
	179	ifeq ($(KBUILD_CHECKSRC),2)
	180	quiet_cmd_force_checksrc = CHECK $<
	181	cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
	182	else
	183	quiet_cmd_checksrc = CHECK $<
	184	cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
	185	endif
	186	endif
	187
	188	# Do section mismatch analysis for each module/built-in.o
	189	ifdef CONFIG_DEBUG_SECTION_MISMATCH
	190	cmd_secanalysis = ; scripts/mod/modpost $@
	191	endif
	192
	193	# Compile C sources (.c)
	194	# ---------------------------------------------------------------------------
	195
	196	# Default is built-in, unless we know otherwise
	197	modkern_cflags = \
	198	$(if $(part-of-module), \
	199	$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
	200	$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
	201	quiet_modtag := $(empty) $(empty)
	202
	203	$(real-objs-m) : part-of-module := y
	204	$(real-objs-m:.o=.i) : part-of-module := y
	205	$(real-objs-m:.o=.s) : part-of-module := y
	206	$(real-objs-m:.o=.lst): part-of-module := y
	207
	208	$(real-objs-m) : quiet_modtag := [M]
	209	$(real-objs-m:.o=.i) : quiet_modtag := [M]
	210	$(real-objs-m:.o=.s) : quiet_modtag := [M]
	211	$(real-objs-m:.o=.lst): quiet_modtag := [M]
	212
	213	$(obj-m) : quiet_modtag := [M]
	214
	215	# Default for not multi-part modules
	216	modname = $(basetarget)
217
218	$(multi-objs-m) : modname = $(modname-multi)
219	$(multi-objs-m:.o=.i) : modname = $(modname-multi)
220	$(multi-objs-m:.o=.s) : modname = $(modname-multi)
221	$(multi-objs-m:.o=.lst) : modname = $(modname-multi)
222	$(multi-objs-y) : modname = $(modname-multi)
223	$(multi-objs-y:.o=.i) : modname = $(modname-multi)
224	$(multi-objs-y:.o=.s) : modname = $(modname-multi)
225	$(multi-objs-y:.o=.lst) : modname = $(modname-multi)
226
227	quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
228	cmd_cc_s_c = $(CC) $(c_flags) -fverbose-asm -S -o $@ $<
229
230	$(obj)/%.s: $(src)/%.c FORCE
231	$(call if_changed_dep,cc_s_c)
232
233	quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@
234	cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $<
235
236	$(obj)/%.i: $(src)/%.c FORCE
237	$(call if_changed_dep,cc_i_c)
238
239	cmd_gensymtypes = \
240	$(CPP) -D__GENKSYMS__ $(c_flags) $< \| \
241	$(GENKSYMS) $(if $(1), -T $(2)) \
242	$(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \
243	$(if $(KBUILD_PRESERVE),-p) \
244	-r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
245
246	quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
247	cmd_cc_symtypes_c = \
248	set -e; \
249	$(call cmd_gensymtypes,true,$@) >/dev/null; \
250	test -s $@ \|\| rm -f $@
251
252	$(obj)/%.symtypes : $(src)/%.c FORCE
253	$(call cmd,cc_symtypes_c)
254
255	# C (.c) files
256	# The C file is compiled and updated dependency information is generated.
257	# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
258
259	quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
260
261	ifndef CONFIG_MODVERSIONS
262	cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
263
264	else
265	# When module versioning is enabled the following steps are executed:
266	# o compile a .tmp_<file>.o from <file>.c
267	# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
268	# not export symbols, we just rename .tmp_<file>.o to <file>.o and
269	# are done.
270	# o otherwise, we calculate symbol versions using the good old
271	# genksyms on the preprocessed source and postprocess them in a way
272	# that they are usable as a linker script
273	# o generate <file>.o from .tmp_<file>.o using the linker to
274	# replace the unresolved symbols __crc_exported_symbol with
275	# the actual value of the checksum generated by genksyms
276
277	cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
278	cmd_modversions = \
279	if $(OBJDUMP) -h $(@D)/.tmp_$(@F) \| grep -q __ksymtab; then \
280	$(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
281	> $(@D)/.tmp_$(@F:.o=.ver); \
282	\
283	$(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
284	-T $(@D)/.tmp_$(@F:.o=.ver); \
285	rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
286	else \
287	mv -f $(@D)/.tmp_$(@F) $@; \
288	fi;
289	endif
290
291	ifdef CONFIG_FTRACE_MCOUNT_RECORD
292	ifdef BUILD_C_RECORDMCOUNT
293	ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
294	RECORDMCOUNT_FLAGS = -w
295	endif
296	# Due to recursion, we must skip empty.o.
297	# The empty.o file is created in the make process in order to determine
298	# the target endianness and word size. It is made before all other C
299	# files, including recordmcount.
300	sub_cmd_record_mcount = \
301	if [ $(@) != "scripts/mod/empty.o" ]; then \
302	$(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \
303	fi;
304	recordmcount_source := $(srctree)/scripts/recordmcount.c \
305	$(srctree)/scripts/recordmcount.h
306	else
307	sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
308	"$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
309	"$(if $(CONFIG_64BIT),64,32)" \
310	"$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \
311	"$(LD)" "$(NM)" "$(RM)" "$(MV)" \
312	"$(if $(part-of-module),1,0)" "$(@)";
313	recordmcount_source := $(srctree)/scripts/recordmcount.pl
314	endif
315	cmd_record_mcount = \
316	if [ "$(findstring -pg,$(_c_flags))" = "-pg" ]; then \
317	$(sub_cmd_record_mcount) \
318	fi;
319	endif
320
321	define rule_cc_o_c
322	$(call echo-cmd,checksrc) $(cmd_checksrc) \
323	$(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \
324	$(cmd_modversions) \
325	$(call echo-cmd,record_mcount) \
326	$(cmd_record_mcount) \
327	scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \
328	$(dot-target).tmp; \
329	rm -f $(depfile); \
330	mv -f $(dot-target).tmp $(dot-target).cmd
331	endef
332
333	# Built-in and composite module parts
334	$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
335	$(call cmd,force_checksrc)
336	$(call if_changed_rule,cc_o_c)
337
338	# Single-part modules are special since we need to mark them in $(MODVERDIR)
339
340	$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
341	$(call cmd,force_checksrc)
342	$(call if_changed_rule,cc_o_c)
343	@{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)
344
345	quiet_cmd_cc_lst_c = MKLST $@
346	cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
347	$(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
348	System.map $(OBJDUMP) > $@
349
350	$(obj)/%.lst: $(src)/%.c FORCE
351	$(call if_changed_dep,cc_lst_c)
352
353	# Compile assembler sources (.S)
354	# ---------------------------------------------------------------------------
355
356	modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)
357
358	$(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
359	$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
360
361	quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
362	cmd_as_s_S = $(CPP) $(a_flags) -o $@ $<
363
364	$(obj)/%.s: $(src)/%.S FORCE
365	$(call if_changed_dep,as_s_S)
366
367	quiet_cmd_as_o_S = AS $(quiet_modtag) $@
368	cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
369
370	$(obj)/%.o: $(src)/%.S FORCE
371	$(call if_changed_dep,as_o_S)
372
373	targets += $(real-objs-y) $(real-objs-m) $(lib-y)
374	targets += $(extra-y) $(MAKECMDGOALS) $(always)
375
376	# Linker scripts preprocessor (.lds.S -> .lds)
377	# ---------------------------------------------------------------------------
378	quiet_cmd_cpp_lds_S = LDS $@
379	cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
380	-D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
381
382	$(obj)/%.lds: $(src)/%.lds.S FORCE
383	$(call if_changed_dep,cpp_lds_S)
384
385	# ASN.1 grammar
386	# ---------------------------------------------------------------------------
387	quiet_cmd_asn1_compiler = ASN.1 $@
388	cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
389	$(subst .h,.c,$@) $(subst .c,.h,$@)
390
391	.PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h
392
393	$(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
394	$(call cmd,asn1_compiler)
395
396	# Build the compiled-in targets
397	# ---------------------------------------------------------------------------
398
399	# To build objects in subdirs, we need to descend into the directories
400	$(sort $(subdir-obj-y)): $(subdir-ym) ;
401
402	#
403	# Rule to compile a set of .o files into one .o file
404	#
405	ifdef builtin-target
406	quiet_cmd_link_o_target = LD $@
407	# If the list of objects to link is empty, just create an empty built-in.o
408	cmd_link_o_target = $(if $(strip $(obj-y)),\
409	$(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \
410	$(cmd_secanalysis),\
411	rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@)
412
413	$(builtin-target): $(obj-y) FORCE
414	$(call if_changed,link_o_target)
415
416	targets += $(builtin-target)
417	endif # builtin-target
418
419	#
420	# Rule to create modules.order file
421	#
422	# Create commands to either record .ko file or cat modules.order from
423	# a subdirectory
424	modorder-cmds = \
425	$(foreach m, $(modorder), \
426	$(if $(filter %/modules.order, $m), \
427	cat $m;, echo kernel/$m;))
428
429	$(modorder-target): $(subdir-ym) FORCE
430	$(Q)(cat /dev/null; $(modorder-cmds)) > $@
431
432	#
433	# Rule to compile a set of .o files into one .a file
434	#
435	ifdef lib-target
436	quiet_cmd_link_l_target = AR $@
437	cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y)
438
439	$(lib-target): $(lib-y) FORCE
440	$(call if_changed,link_l_target)
441
442	targets += $(lib-target)
443	endif
444
445	#
446	# Rule to link composite objects
447	#
448	# Composite objects are specified in kbuild makefile as follows:
449	# <composite-object>-objs := <list of .o files>
450	# or
451	# <composite-object>-y := <list of .o files>
452	link_multi_deps = \
453	$(filter $(addprefix $(obj)/, \
454	$($(subst $(obj)/,,$(@:.o=-objs))) \
455	$($(subst $(obj)/,,$(@:.o=-y)))), $^)
456
457	quiet_cmd_link_multi-y = LD $@
458	cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
459
460	quiet_cmd_link_multi-m = LD [M] $@
461	cmd_link_multi-m = $(cmd_link_multi-y)
462
463	# We would rather have a list of rules like
464	# foo.o: $(foo-objs)
465	# but that's not so easy, so we rather make all composite objects depend
466	# on the set of all their parts
467	$(multi-used-y) : %.o: $(multi-objs-y) FORCE
468	$(call if_changed,link_multi-y)
469
470	$(multi-used-m) : %.o: $(multi-objs-m) FORCE
471	$(call if_changed,link_multi-m)
472	@{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod)
473
474	targets += $(multi-used-y) $(multi-used-m)
475
476
477	# Descending
478	# ---------------------------------------------------------------------------
479
480	PHONY += $(subdir-ym)
481	$(subdir-ym):
482	$(Q)$(MAKE) $(build)=$@
483
484	# Add FORCE to the prequisites of a target to force it to be always rebuilt.
485	# ---------------------------------------------------------------------------
486
487	PHONY += FORCE
488
489	FORCE:
490
491	# Read all saved command lines and dependencies for the $(targets) we
492	# may be building above, using $(if_changed{,_dep}). As an
493	# optimization, we don't need to read them if the target does not
494	# exist, we will rebuild anyway in that case.
495
496	targets := $(wildcard $(sort $(targets)))
497	cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
498
499	ifneq ($(cmd_files),)
500	include $(cmd_files)
501	endif
502
503	# Declare the contents of the .PHONY variable as phony. We keep that
504	# information in a variable se we can use it in if_changed and friends.
505
506	.PHONY: $(PHONY)