Makefile.main - skiboot - Git at Google

 # -*-Makefile-*-
 #
 # This is the main Makefile

 # Target tools
 CC=$(CROSS)gcc$(POSTFIX)
 LD=$(CROSS)ld$(POSTFIX)
 AS=$(CROSS)as
 AR=$(CROSS)ar
 NM=$(CROSS)nm
 OBJCOPY=$(CROSS)objcopy
 OBJDUMP=$(CROSS)objdump
 SIZE=$(CROSS)size
 LD_TEXT=0x0
 NM += --synthetic

 try = $(shell set -e; if ($(1)) >/dev/null 2>&1; \
 	then echo "$(2)"; \
 	else echo "$(3)"; fi )

 try-cflag = $(call try,$(1) $(2) -x c -c /dev/null -o /dev/null,$(2))

 # Base warnings
 CWARNS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 	  -Werror-implicit-function-declaration -Wdeclaration-after-statement \
 	  -Wno-pointer-sign -Wextra -Wno-sign-compare \
 	  -Wmissing-prototypes -Wmissing-declarations \
 	  -Wwrite-strings -Wcast-align \
 	  -Winit-self \
 	  -Wframe-larger-than=1024 \
 	  -Werror

 # Host tools and options
 HOSTCC=gcc
 HOSTEND=$(shell uname -m | sed -e 's/^i.*86$$/LITTLE/' -e 's/^x86.*/LITTLE/' -e 's/^ppc64le/LITTLE/' -e 's/^ppc.*/BIG/')
 HOSTCFLAGS=-O1 $(CWARNS) -DHAVE_$(HOSTEND)_ENDIAN -MMD
 HOSTCFLAGS += $(call try-cflag,$(HOSTCC),-std=gnu11)
 HOSTCFLAGS += $(call try-cflag,$(HOSTCC),-m64)
 HOSTCFLAGS += $(call try-cflag,$(HOSTCC),-Wjump-misses-init) \
 	  $(call try-cflag,$(HOSTCC),-Wsuggest-attribute=const) \
 	  $(call try-cflag,$(HOSTCC),-Wsuggest-attribute=noreturn)
 HOSTCFLAGS += -DDEBUG -DCCAN_LIST_DEBUG

 HOSTGCOVCFLAGS = -fprofile-arcs -ftest-coverage -lgcov -O0 -g -pg

 VALGRIND=valgrind -q --show-reachable=yes --error-exitcode=99

 # Target options

 OPTS=-Os
 DBG=-g

 CPPFLAGS := -I$(SRC)/include -Iinclude -MMD -include $(SRC)/include/config.h
 CPPFLAGS += -I$(SRC)/libfdt -I$(SRC)/libflash -I$(SRC)/libxz -I$(SRC)/libc/include -I$(SRC)
 CPPFLAGS += -I$(SRC)/libpore
 CPPFLAGS += -D__SKIBOOT__ -nostdinc
 CPPFLAGS += -isystem $(shell $(CC) -print-file-name=include)
 CPPFLAGS += -DBITS_PER_LONG=64 -DHAVE_BIG_ENDIAN
 # We might want to remove our copy of stdint.h
 # but that means uint64_t becomes an ulong instead of an ullong
 # causing all our printf's to warn
 CPPFLAGS += -ffreestanding

 ifeq ($(DEBUG),1)
 CPPFLAGS += -DDEBUG -DCCAN_LIST_DEBUG
 endif

 CFLAGS := -fno-strict-aliasing -pie -fpie -fno-pic -mbig-endian -m64
 CFLAGS += -mcpu=power7
 CFLAGS += -Wl,--oformat,elf64-powerpc
 CFLAGS += -ffixed-r13
 CFLAGS += $(call try-cflag,$(CC),-std=gnu11)
 ifeq ($(ELF_ABI_v2),1)
 CFLAGS += $(call try-cflag,$(CC),-mabi=elfv2)
 else
 CFLAGS += $(call try-cflag,$(CC),-mabi=elfv1)
 endif

 ifeq ($(DEAD_CODE_ELIMINATION),1)
 CFLAGS += -ffunction-sections -fdata-sections
 endif

 ifeq ($(SKIBOOT_GCOV),1)
 CFLAGS += -fprofile-arcs -ftest-coverage -DSKIBOOT_GCOV=1
 endif

 # Stack protector disabled for now. gcc tends to use the TLS to
 # access the canary (depending on how gcc was built), and this won't
 # work for us.
 #
 ifeq ($(STACK_CHECK),1)
 #CFLAGS += -fstack-protector-all -pg
 CFLAGS += -fno-stack-protector -pg
 CPPFLAGS += -DSTACK_CHECK_ENABLED
 else
 CFLAGS += -fno-stack-protector
 #CFLAGS += -fstack-protector
 #CFLAGS += $(call try-cflag,$(CC),-fstack-protector-strong)
 endif

 CFLAGS += $(call try-cflag,$(CC),-Wjump-misses-init) \
 	  $(call try-cflag,$(CC),-Wsuggest-attribute=const) \
 	  $(call try-cflag,$(CC),-Wsuggest-attribute=noreturn) \
 	  $(call try-cflag,$(CC),-Wstack-usage=1024)

 CFLAGS += $(CWARNS) $(OPTS) $(DBG)

 LDFLAGS := -m64 -static -nostdlib -pie
 LDFLAGS += -Wl,-pie
 LDFLAGS += -Wl,-Ttext-segment,$(LD_TEXT) -Wl,-N -Wl,--build-id=none
 LDFLAGS += -Wl,--no-multi-toc
 LDFLAGS += -mcpu=power7 -mbig-endian -Wl,--oformat,elf64-powerpc

 LDRFLAGS=-melf64ppc
 # Debug stuff
 #LDFLAGS += -Wl,-v -Wl,-Map,foomap

 ifeq ($(DEAD_CODE_ELIMINATION),1)
 LDFLAGS += -Wl,--gc-sections
 endif

 AFLAGS := -D__ASSEMBLY__ -mbig-endian -m64
 ifeq ($(ELF_ABI_v2),1)
 AFLAGS += $(call try-cflag,$(CC),-mabi=elfv2)
 else
 AFLAGS += $(call try-cflag,$(CC),-mabi=elfv1)
 endif

 # Special tool flags:
 # Do not use the floating point unit
 CFLAGS += -msoft-float
 # Do not use string instructions
 CFLAGS += -mno-string
 # do not use load/store multiple word instrcutions
 CFLAGS += -mno-multiple
 # do not use any automatic vector foo
 # While it would be safe during boot, we don't save/restore across OPAL calls
 CFLAGS += $(call try-cflag,$(CC),-mno-vsx) \
 	$(call try-cflag,$(CC),-mno-direct-move) \
 	$(call try-cflag,$(CC),-mno-altivec)

 # Do not use load/store update. You REALLY do not want to use this!
 # The async safety of the ABI stack depends on the atomicity
 # of update on store.
 #CFLAGS += -mno-update

 ifneq ($(KERNEL),)
 CPPFLAGS += -DBUILTIN_KERNEL="\"$(KERNEL)\""
 endif

 CHECK		= sparse
 CHECKFLAGS     := $(CF)
 CHECK_CFLAGS_SKIP = -std=gnu11

 .SECONDARY:

 vpath %.c $(SRC)
 vpath %.C $(SRC)
 vpath %.S $(SRC)

 default: all

 include/asm-offsets.h: asm/asm-offsets.s
 	@mkdir -p include
 	$(call Q,GN, $(SRC)/make_offsets.sh $< >$@, $@)

 TARGET = skiboot

 include $(SRC)/asm/Makefile.inc
 include $(SRC)/core/Makefile.inc
 include $(SRC)/hw/Makefile.inc
 include $(SRC)/platforms/Makefile.inc
 include $(SRC)/libfdt/Makefile.inc
 include $(SRC)/libflash/Makefile.inc
 include $(SRC)/libxz/Makefile.inc
 include $(SRC)/libpore/Makefile.inc
 include $(SRC)/libc/Makefile.inc
 include $(SRC)/ccan/Makefile.inc
 include $(SRC)/$(DEVSRC)/Makefile.inc
 include $(SRC)/libstb/Makefile.inc

 # hack for travis-ci and coverity
 gard:
 	(cd external/gard; CROSS_COMPILE="" CFLAGS="$(HOSTCFLAGS) $(HOSTGCOVCFLAGS)" make)

 pflash:
 	(cd external/pflash; CROSS_COMPILE="" CFLAGS="$(HOSTCFLAGS) $(HOSTGCOVCFLAGS)" make)

 pflash-coverity:
 	(cd external/pflash; ./build-all-arch.sh)

 all: $(SUBDIRS) $(TARGET).lid $(TARGET).lid.xz $(TARGET).map extract-gcov
 all: $(TARGET).lid.stb $(TARGET).lid.xz.stb

 OBJS := $(ASM) $(CORE) $(HW) $(PLATFORMS) $(LIBFDT) $(LIBXZ) $(LIBFLASH) $(LIBSTB)
 OBJS += $(LIBC) $(CCAN) $(DEVSRC_OBJ) $(LIBPORE)
 OBJS_NO_VER = $(OBJS)
 ALL_OBJS = $(OBJS) version.o

 ALL_OBJS_1 = $(ALL_OBJS) asm/dummy_map.o
 ALL_OBJS_2 = $(ALL_OBJS) asm/real_map.o

 $(TARGET).lid.xz: $(TARGET).lid
 	$(call Q,XZ, cat $^ | xz -9 -C crc32 > $@, $@)

 $(TARGET).lid: $(TARGET).elf
 	$(call Q,OBJCOPY, $(OBJCOPY) -O binary -S $^ $@, $@)

 $(TARGET).lid.stb: $(TARGET).lid libstb/create-container
 	$(call Q,STB-DEVELOPMENT-SIGNED-CONTAINER,$(SRC)/libstb/sign-with-local-keys.sh $< $@ $(SRC)/libstb/keys/ PAYLOAD,$@)

 $(TARGET).lid.xz.stb: $(TARGET).lid.xz libstb/create-container
 	$(call Q,STB-DEVELOPMENT-SIGNED-CONTAINER,$(SRC)/libstb/sign-with-local-keys.sh $< $@ $(SRC)/libstb/keys/ PAYLOAD,$@)

 $(TARGET).tmp.elf: $(ALL_OBJS_1) $(TARGET).lds $(KERNEL)
 	$(call Q,LD, $(CC) $(LDFLAGS) -T $(TARGET).lds $(ALL_OBJS_1) -o $@, $@)

 asm/real_map.o : $(TARGET).tmp.map

 $(TARGET).elf: $(ALL_OBJS_2) $(TARGET).lds $(KERNEL)
 	$(call Q,LD, $(CC) $(LDFLAGS) -T $(TARGET).lds $(ALL_OBJS_2) -o $@, $@)

 $(SUBDIRS):
 	$(call Q,MKDIR,mkdir -p $@, $@)

 -include $(wildcard *.d)
 -include $(wildcard $(SUBDIRS:%=%/*.d))

 # Set V=1 if you want to see everything.
 include $(SRC)/Makefile.rules

 VERSION ?= $(shell cd $(SRC); GIT_DIR=$(SRC)/.git $(SRC)/make_version.sh)

 .PHONY: VERSION-always
 .version: VERSION-always
 	@echo $(VERSION) > $@.tmp
 	@cmp -s $@ $@.tmp || cp $@.tmp $@
 	@rm -f $@.tmp

 version.c: $(SRC)/make_version.sh $(OBJS_NO_VER) .version
 	@(if [ "a$(VERSION)" = "a" ]; then \
 		echo "#error You need to set SKIBOOT_VERSION environment variable" > $@ ;\
         else \
                 echo "const char version[] = \"$(VERSION)\";" ;\
         fi) > $@

 .PHONY: coverage
 include $(shell find $(SRC)/* -name Makefile.check)

 extract-gcov: extract-gcov.c
 	$(call Q, HOSTCC ,$(HOSTCC) $(HOSTCFLAGS) \
 	-DTARGET__GNUC__=`echo '__GNUC__'|$(CC) -E -|grep -v '^#'` \
 	-DTARGET__GNUC_MINOR__=`echo '__GNUC_MINOR__'|$(CC) -E -|grep -v '^#'` \
 	-Wpadded -O0 -g -I$(SRC) -o $@ $<,$<)

 coverage-report: skiboot.info
 	genhtml --branch-coverage -q -o $@ $<

 # A rather nasty hack here that relies on the lcov file format
 external/pflash/pflash.info: coverage
 	(cd external/pflash; lcov -q -c -d . -o pflash.info --rc lcov_branch_coverage=1; sed -i -e 's%external/pflash/libflash%libflash%; s%external/pflash/ccan%ccan%' pflash.info)
 external/gard/gard.info: coverage
 	(cd external/gard; lcov -q -c -d . -o gard.info --rc lcov_branch_coverage=1; sed -i -e 's%external/gard/libflash%libflash%; s%external/gard/ccan%ccan%' gard.info)

 skiboot.info: coverage external/pflash/pflash.info external/gard/gard.info
 	lcov -q -c -d . $(LCOV_DIRS) -o $@ --rc lcov_branch_coverage=1
 	lcov -q -r $@ 'external/pflash/*' -o $@
 	lcov -q -r $@ 'external/gard/*' -o $@
 	lcov -q -a $@ -a external/pflash/pflash.info -o $@
 	lcov -q -a $@ -a external/gard/gard.info -o $@
 	lcov -q -r $@ $(LCOV_EXCLUDE) -o $@ --rc lcov_branch_coverage=1

 tags:
 	find . -name '*.[chS]' | xargs ctags

 TAGS:
 	find . -name '*.[chS]' | xargs etags

 .PHONY: tags TAGS check coverage

 cscope:
 	find . -name '*.[chS]' | xargs cscope

 clean:
 	$(RM) *.[odsa] $(SUBDIRS:%=%/*.[odsa])
 	$(RM) *.elf $(TARGET).lid *.map $(TARGET).lds $(TARGET).lid.xz
 	$(RM) include/asm-offsets.h version.c .version
 	$(RM) skiboot.info external/gard/gard.info external/pflash/pflash.info
 	$(RM) extract-gcov $(TARGET).lid.stb $(TARGET).lid.xz.stb

 distclean: clean
 	$(RM) *~ $(SUBDIRS:%=%/*~) include/*~
	# --Makefile--
	#
	# This is the main Makefile

	# Target tools
	CC=$(CROSS)gcc$(POSTFIX)
	LD=$(CROSS)ld$(POSTFIX)
	AS=$(CROSS)as
	AR=$(CROSS)ar
	NM=$(CROSS)nm
	OBJCOPY=$(CROSS)objcopy
	OBJDUMP=$(CROSS)objdump
	SIZE=$(CROSS)size
	LD_TEXT=0x0
	NM += --synthetic

	try = $(shell set -e; if ($(1)) >/dev/null 2>&1; \
	then echo "$(2)"; \
	else echo "$(3)"; fi )

	try-cflag = $(call try,$(1) $(2) -x c -c /dev/null -o /dev/null,$(2))

	# Base warnings
	CWARNS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
	-Werror-implicit-function-declaration -Wdeclaration-after-statement \
	-Wno-pointer-sign -Wextra -Wno-sign-compare \
	-Wmissing-prototypes -Wmissing-declarations \
	-Wwrite-strings -Wcast-align \
	-Winit-self \
	-Wframe-larger-than=1024 \
	-Werror

	# Host tools and options
	HOSTCC=gcc
	HOSTEND=$(shell uname -m \| sed -e 's/^i.86$$/LITTLE/' -e 's/^x86./LITTLE/' -e 's/^ppc64le/LITTLE/' -e 's/^ppc.*/BIG/')
	HOSTCFLAGS=-O1 $(CWARNS) -DHAVE_$(HOSTEND)_ENDIAN -MMD
	HOSTCFLAGS += $(call try-cflag,$(HOSTCC),-std=gnu11)
	HOSTCFLAGS += $(call try-cflag,$(HOSTCC),-m64)
	HOSTCFLAGS += $(call try-cflag,$(HOSTCC),-Wjump-misses-init) \
	$(call try-cflag,$(HOSTCC),-Wsuggest-attribute=const) \
	$(call try-cflag,$(HOSTCC),-Wsuggest-attribute=noreturn)
	HOSTCFLAGS += -DDEBUG -DCCAN_LIST_DEBUG

	HOSTGCOVCFLAGS = -fprofile-arcs -ftest-coverage -lgcov -O0 -g -pg

	VALGRIND=valgrind -q --show-reachable=yes --error-exitcode=99

	# Target options

	OPTS=-Os
	DBG=-g

	CPPFLAGS := -I$(SRC)/include -Iinclude -MMD -include $(SRC)/include/config.h
	CPPFLAGS += -I$(SRC)/libfdt -I$(SRC)/libflash -I$(SRC)/libxz -I$(SRC)/libc/include -I$(SRC)
	CPPFLAGS += -I$(SRC)/libpore
	CPPFLAGS += -D__SKIBOOT__ -nostdinc
	CPPFLAGS += -isystem $(shell $(CC) -print-file-name=include)
	CPPFLAGS += -DBITS_PER_LONG=64 -DHAVE_BIG_ENDIAN
	# We might want to remove our copy of stdint.h
	# but that means uint64_t becomes an ulong instead of an ullong
	# causing all our printf's to warn
	CPPFLAGS += -ffreestanding

	ifeq ($(DEBUG),1)
	CPPFLAGS += -DDEBUG -DCCAN_LIST_DEBUG
	endif

	CFLAGS := -fno-strict-aliasing -pie -fpie -fno-pic -mbig-endian -m64
	CFLAGS += -mcpu=power7
	CFLAGS += -Wl,--oformat,elf64-powerpc
	CFLAGS += -ffixed-r13
	CFLAGS += $(call try-cflag,$(CC),-std=gnu11)
	ifeq ($(ELF_ABI_v2),1)
	CFLAGS += $(call try-cflag,$(CC),-mabi=elfv2)
	else
	CFLAGS += $(call try-cflag,$(CC),-mabi=elfv1)
	endif

	ifeq ($(DEAD_CODE_ELIMINATION),1)
	CFLAGS += -ffunction-sections -fdata-sections
	endif

	ifeq ($(SKIBOOT_GCOV),1)
	CFLAGS += -fprofile-arcs -ftest-coverage -DSKIBOOT_GCOV=1
	endif

	# Stack protector disabled for now. gcc tends to use the TLS to
	# access the canary (depending on how gcc was built), and this won't
	# work for us.
	#
	ifeq ($(STACK_CHECK),1)
	#CFLAGS += -fstack-protector-all -pg
	CFLAGS += -fno-stack-protector -pg
	CPPFLAGS += -DSTACK_CHECK_ENABLED
	else
	CFLAGS += -fno-stack-protector
	#CFLAGS += -fstack-protector
	#CFLAGS += $(call try-cflag,$(CC),-fstack-protector-strong)
	endif

	CFLAGS += $(call try-cflag,$(CC),-Wjump-misses-init) \
	$(call try-cflag,$(CC),-Wsuggest-attribute=const) \
	$(call try-cflag,$(CC),-Wsuggest-attribute=noreturn) \
	$(call try-cflag,$(CC),-Wstack-usage=1024)

	CFLAGS += $(CWARNS) $(OPTS) $(DBG)

	LDFLAGS := -m64 -static -nostdlib -pie
	LDFLAGS += -Wl,-pie
	LDFLAGS += -Wl,-Ttext-segment,$(LD_TEXT) -Wl,-N -Wl,--build-id=none
	LDFLAGS += -Wl,--no-multi-toc
	LDFLAGS += -mcpu=power7 -mbig-endian -Wl,--oformat,elf64-powerpc

	LDRFLAGS=-melf64ppc
	# Debug stuff
	#LDFLAGS += -Wl,-v -Wl,-Map,foomap

	ifeq ($(DEAD_CODE_ELIMINATION),1)
	LDFLAGS += -Wl,--gc-sections
	endif

	AFLAGS := -D__ASSEMBLY__ -mbig-endian -m64
	ifeq ($(ELF_ABI_v2),1)
	AFLAGS += $(call try-cflag,$(CC),-mabi=elfv2)
	else
	AFLAGS += $(call try-cflag,$(CC),-mabi=elfv1)
	endif

	# Special tool flags:
	# Do not use the floating point unit
	CFLAGS += -msoft-float
	# Do not use string instructions
	CFLAGS += -mno-string
	# do not use load/store multiple word instrcutions
	CFLAGS += -mno-multiple
	# do not use any automatic vector foo
	# While it would be safe during boot, we don't save/restore across OPAL calls
	CFLAGS += $(call try-cflag,$(CC),-mno-vsx) \
	$(call try-cflag,$(CC),-mno-direct-move) \
	$(call try-cflag,$(CC),-mno-altivec)

	# Do not use load/store update. You REALLY do not want to use this!
	# The async safety of the ABI stack depends on the atomicity
	# of update on store.
	#CFLAGS += -mno-update

	ifneq ($(KERNEL),)
	CPPFLAGS += -DBUILTIN_KERNEL="\"$(KERNEL)\""
	endif

	CHECK = sparse
	CHECKFLAGS := $(CF)
	CHECK_CFLAGS_SKIP = -std=gnu11

	.SECONDARY:

	vpath %.c $(SRC)
	vpath %.C $(SRC)
	vpath %.S $(SRC)

	default: all

	include/asm-offsets.h: asm/asm-offsets.s
	@mkdir -p include
	$(call Q,GN, $(SRC)/make_offsets.sh $< >$@, $@)

	TARGET = skiboot

	include $(SRC)/asm/Makefile.inc
	include $(SRC)/core/Makefile.inc
	include $(SRC)/hw/Makefile.inc
	include $(SRC)/platforms/Makefile.inc
	include $(SRC)/libfdt/Makefile.inc
	include $(SRC)/libflash/Makefile.inc
	include $(SRC)/libxz/Makefile.inc
	include $(SRC)/libpore/Makefile.inc
	include $(SRC)/libc/Makefile.inc
	include $(SRC)/ccan/Makefile.inc
	include $(SRC)/$(DEVSRC)/Makefile.inc
	include $(SRC)/libstb/Makefile.inc

	# hack for travis-ci and coverity
	gard:
	(cd external/gard; CROSS_COMPILE="" CFLAGS="$(HOSTCFLAGS) $(HOSTGCOVCFLAGS)" make)

	pflash:
	(cd external/pflash; CROSS_COMPILE="" CFLAGS="$(HOSTCFLAGS) $(HOSTGCOVCFLAGS)" make)

	pflash-coverity:
	(cd external/pflash; ./build-all-arch.sh)

	all: $(SUBDIRS) $(TARGET).lid $(TARGET).lid.xz $(TARGET).map extract-gcov
	all: $(TARGET).lid.stb $(TARGET).lid.xz.stb

	OBJS := $(ASM) $(CORE) $(HW) $(PLATFORMS) $(LIBFDT) $(LIBXZ) $(LIBFLASH) $(LIBSTB)
	OBJS += $(LIBC) $(CCAN) $(DEVSRC_OBJ) $(LIBPORE)
	OBJS_NO_VER = $(OBJS)
	ALL_OBJS = $(OBJS) version.o

	ALL_OBJS_1 = $(ALL_OBJS) asm/dummy_map.o
	ALL_OBJS_2 = $(ALL_OBJS) asm/real_map.o

	$(TARGET).lid.xz: $(TARGET).lid
	$(call Q,XZ, cat $^ \| xz -9 -C crc32 > $@, $@)

	$(TARGET).lid: $(TARGET).elf
	$(call Q,OBJCOPY, $(OBJCOPY) -O binary -S $^ $@, $@)

	$(TARGET).lid.stb: $(TARGET).lid libstb/create-container
	$(call Q,STB-DEVELOPMENT-SIGNED-CONTAINER,$(SRC)/libstb/sign-with-local-keys.sh $< $@ $(SRC)/libstb/keys/ PAYLOAD,$@)

	$(TARGET).lid.xz.stb: $(TARGET).lid.xz libstb/create-container
	$(call Q,STB-DEVELOPMENT-SIGNED-CONTAINER,$(SRC)/libstb/sign-with-local-keys.sh $< $@ $(SRC)/libstb/keys/ PAYLOAD,$@)

	$(TARGET).tmp.elf: $(ALL_OBJS_1) $(TARGET).lds $(KERNEL)
	$(call Q,LD, $(CC) $(LDFLAGS) -T $(TARGET).lds $(ALL_OBJS_1) -o $@, $@)

	asm/real_map.o : $(TARGET).tmp.map

	$(TARGET).elf: $(ALL_OBJS_2) $(TARGET).lds $(KERNEL)
	$(call Q,LD, $(CC) $(LDFLAGS) -T $(TARGET).lds $(ALL_OBJS_2) -o $@, $@)

	$(SUBDIRS):
	$(call Q,MKDIR,mkdir -p $@, $@)

	-include $(wildcard *.d)
	-include $(wildcard $(SUBDIRS:%=%/*.d))

	# Set V=1 if you want to see everything.
	include $(SRC)/Makefile.rules

	VERSION ?= $(shell cd $(SRC); GIT_DIR=$(SRC)/.git $(SRC)/make_version.sh)

	.PHONY: VERSION-always
	.version: VERSION-always
	@echo $(VERSION) > $@.tmp
	@cmp -s $@ $@.tmp \|\| cp $@.tmp $@
	@rm -f $@.tmp

	version.c: $(SRC)/make_version.sh $(OBJS_NO_VER) .version
	@(if [ "a$(VERSION)" = "a" ]; then \
	echo "#error You need to set SKIBOOT_VERSION environment variable" > $@ ;\
	else \
	echo "const char version[] = \"$(VERSION)\";" ;\
	fi) > $@

	.PHONY: coverage
	include $(shell find $(SRC)/* -name Makefile.check)

	extract-gcov: extract-gcov.c
	$(call Q, HOSTCC ,$(HOSTCC) $(HOSTCFLAGS) \
	-DTARGET__GNUC__=`echo '__GNUC__'\|$(CC) -E -\|grep -v '^#'` \
	-DTARGET__GNUC_MINOR__=`echo '__GNUC_MINOR__'\|$(CC) -E -\|grep -v '^#'` \
	-Wpadded -O0 -g -I$(SRC) -o $@ $<,$<)

	coverage-report: skiboot.info
	genhtml --branch-coverage -q -o $@ $<

	# A rather nasty hack here that relies on the lcov file format
	external/pflash/pflash.info: coverage
	(cd external/pflash; lcov -q -c -d . -o pflash.info --rc lcov_branch_coverage=1; sed -i -e 's%external/pflash/libflash%libflash%; s%external/pflash/ccan%ccan%' pflash.info)
	external/gard/gard.info: coverage
	(cd external/gard; lcov -q -c -d . -o gard.info --rc lcov_branch_coverage=1; sed -i -e 's%external/gard/libflash%libflash%; s%external/gard/ccan%ccan%' gard.info)

	skiboot.info: coverage external/pflash/pflash.info external/gard/gard.info
	lcov -q -c -d . $(LCOV_DIRS) -o $@ --rc lcov_branch_coverage=1
	lcov -q -r $@ 'external/pflash/*' -o $@
	lcov -q -r $@ 'external/gard/*' -o $@
	lcov -q -a $@ -a external/pflash/pflash.info -o $@
	lcov -q -a $@ -a external/gard/gard.info -o $@
	lcov -q -r $@ $(LCOV_EXCLUDE) -o $@ --rc lcov_branch_coverage=1

	tags:
	find . -name '*.[chS]' \| xargs ctags

	TAGS:
	find . -name '*.[chS]' \| xargs etags

	.PHONY: tags TAGS check coverage

	cscope:
	find . -name '*.[chS]' \| xargs cscope

	clean:
	$(RM) .[odsa] $(SUBDIRS:%=%/.[odsa])
	$(RM) .elf $(TARGET).lid .map $(TARGET).lds $(TARGET).lid.xz
	$(RM) include/asm-offsets.h version.c .version
	$(RM) skiboot.info external/gard/gard.info external/pflash/pflash.info
	$(RM) extract-gcov $(TARGET).lid.stb $(TARGET).lid.xz.stb

	distclean: clean
	$(RM) ~ $(SUBDIRS:%=%/~) include/*~