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add first commit
2022-08-15 04:20:27 -05:00
CONFIG_CROSS_COMPILE := arm-none-eabi-
CONFIG_STRICT_CFLAGS ?= y
CONFIG_SAVE_TARGET ?= n
CONFIG_FORCE_WIN_SHELL ?= y
export CONFIG_STRICT_CFLAGS CONFIG_SAVE_TARGET CONFIG_FORCE_WIN_SHELL
# ---------------------------------------------------------------------------
# Platform and shell detection
export WIN_PLAT := n
ifeq ($(OS),Windows_NT)
# Detect Cygwin
ifneq ($(findstring /,$(PWD)),/)
# also $(findstring /,$(HOME)) ?
WIN_PLAT := y
endif
endif
export WIN_SHELL := n
ifeq ($(WIN_PLAT),y)
ifeq ($(CONFIG_FORCE_WIN_SHELL),y)
WIN_SHELL := y
else
# Detect Unix-style shell
ifeq ($(shell echo $$0),$$0)
WIN_SHELL := y
endif
endif
endif
BACKSLASH := \ # backslash
BACKSLASH := $(strip $(BACKSLASH))
TO_UNIX_PATH = $(subst $(BACKSLASH),/,$(1))
TO_WIN_PATH = $(subst /,$(BACKSLASH),$(1))
ESC_WIN_PATH = $(subst $(BACKSLASH),$(BACKSLASH)$(BACKSLASH),$(1))
ifeq ($(WIN_PLAT),y)
ifeq ($(WIN_SHELL),y)
# make will choose sh.exe as SHELL if it finds sh.exe in the directories of PATH, regardless of
# the setting in environment or parent (e.g., when git.exe is in the PATH)
SHELL := cmd.exe
SHELL_CMD = $(call TO_WIN_PATH,$(1))
else
SHELL_CMD = $(call ESC_WIN_PATH,$(call TO_WIN_PATH,$(1)))
endif
else
SHELL_CMD = $(1)
endif
# The Unix-style path is recognized by compiler toolchain, GNU utilities and windows redirection
# operators, but not by windows native commands (e.g., mkdir) and applications.
# End of platform and shell detection
# ---------------------------------------------------------------------------
# Do not use make's built-in rules and variables
# (this increases performance and avoids hard-to-debug behaviour);
MAKEFLAGS += -rR
# Avoid funny character set dependencies
unexport LC_ALL
LC_COLLATE=C
LC_NUMERIC=C
export LC_COLLATE LC_NUMERIC
# Avoid interference with shell env settings
unexport GREP_OPTIONS
# Check if just to show the help content
ifeq ($(MAKECMDGOALS),help)
ifeq ($(T),)
HELP_TARGET := 1
endif
endif
ifneq ($(HELP_TARGET),1)
# We are using a recursive build, so we need to do a little thinking
# to get the ordering right.
#
# Most importantly: sub-Makefiles should only ever modify files in
# their own directory. If in some directory we have a dependency on
# a file in another dir (which doesn't happen often, but it's often
# unavoidable when linking the built-in.o targets which finally
# turn into elf file), we will call a sub make in that other dir, and
# after that we are sure that everything which is in that other dir
# is now up to date.
#
# The only cases where we need to modify files which have global
# effects are thus separated out and done before the recursive
# descending is started. They are now explicitly listed as the
# prepare rule.
# Beautify output
# ---------------------------------------------------------------------------
#
# Normally, we echo the whole command before executing it. By making
# that echo $($(quiet)$(cmd)), we now have the possibility to set
# $(quiet) to choose other forms of output instead, e.g.
#
# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
#
# If $(quiet) is empty, the whole command will be printed.
# If it is set to "quiet_", only the short version will be printed.
# If it is set to "silent_", nothing will be printed at all, since
# the variable $(silent_cmd_cc_o_c) doesn't exist.
#
# A simple variant is to prefix commands with $(Q) - that's useful
# for commands that shall be hidden in non-verbose mode.
#
# $(Q)ln $@ :<
#
# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
# If KBUILD_VERBOSE equals 1 then the above command is displayed.
#
# To put more focus on warnings, be less verbose as default
# Use 'make V=1' to see the full commands
ifeq ("$(origin V)","command line")
KBUILD_VERBOSE = $(V)
endif
ifndef KBUILD_VERBOSE
KBUILD_VERBOSE = 0
endif
ifeq ($(KBUILD_VERBOSE),1)
quiet :=
Q :=
else
quiet := quiet_
Q := @
endif
# If the user is running make -s (silent mode), suppress echoing of
# commands
ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
quiet=silent_
endif
else # make-3.8x
ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
quiet=silent_
endif
endif
export quiet Q KBUILD_VERBOSE
TARGET_CFG_FILE = config/$(T)/target.mk
TARGET_COMMON_FILE = config/common.mk
# To locate output files in a separate directory two syntaxes are supported.
# In both cases the working directory must be the root of the kernel src.
# 1) O=
# Use "make O=dir/to/store/output/files/"
#
# 2) Set KBUILD_OUTPUT
# Set the environment variable KBUILD_OUTPUT to point to the directory
# where the output files shall be placed.
# export KBUILD_OUTPUT=dir/to/store/output/files/
# make
#
# The O= assignment takes precedence over the KBUILD_OUTPUT environment
# variable.
# KBUILD_SRC is set on invocation of make in OBJ directory
# KBUILD_SRC is not intended to be used by the regular user (for now)
ifeq ($(KBUILD_SRC),)
export KBUILD_ROOT := $(CURDIR)
# OK, Make called in directory where kernel src resides
# Do we want to locate output files in a separate directory?
export KBUILD_OUTPUT := $(CURDIR)/out
ifeq ("$(origin O)","command line")
KBUILD_OUTPUT := $(O)
endif
# Select target
ifeq ($(CONFIG_SAVE_TARGET),y)
ifeq ($(T),)
-include $(KBUILD_OUTPUT)/.config
T := $(strip $(T))
endif
endif
ifeq ($(T),)
$(error Please specify the target in the command line: T=<targetName>)
endif
ifeq ($(wildcard $(TARGET_CFG_FILE)),)
$(error Invalid target: T=$(T))
endif
export T
KBUILD_OUTPUT := $(KBUILD_OUTPUT)/$(T)
# That's our default target when none is given on the command line
PHONY := _all
_all:
# Cancel implicit rules on the config file
$(KBUILD_OUTPUT)/.config: ;
ifneq ($(KBUILD_OUTPUT),)
# Invoke a second make in the output directory, passing relevant variables
# check that the output directory actually exists
saved-output := $(KBUILD_OUTPUT)
ifeq ($(WIN_PLAT),y)
KBUILD_OUTPUT := $(subst /,\,$(KBUILD_OUTPUT))
KBUILD_OUTPUT := $(shell ( if not exist $(KBUILD_OUTPUT)\ mkdir $(KBUILD_OUTPUT) ) \
&& cd $(KBUILD_OUTPUT) && cd)
KBUILD_OUTPUT := $(subst \,/,$(KBUILD_OUTPUT))
else
KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
&& /bin/pwd)
endif
$(if $(KBUILD_OUTPUT),, \
$(error failed to create output directory "$(saved-output)"))
ifeq ($(CONFIG_SAVE_TARGET),y)
ifeq ($(WIN_PLAT),y)
_dummy := $(shell echo T := $(T)> $(KBUILD_OUTPUT)/../.config)
else
_dummy := $(shell echo "T := $(T)" > $(KBUILD_OUTPUT)/../.config)
endif
endif
PHONY += $(MAKECMDGOALS) sub-make
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
@:
include $(CURDIR)/scripts/submods_init.mk
ifneq ($(filter allclean,$(MAKECMDGOALS)),)
ALLCLEAN := 1
export ALLCLEAN
endif
# Look for make include files relative to root of kernel src
MAKEFLAGS += --include-dir=$(CURDIR)
ifeq ($(WIN_PLAT),y)
START_TIME := $(shell echo %time%)
START_DATE_TIME := $(shell echo %date% %time%)
else
START_TIME := $(shell date +"%s.%N")
START_DATE_TIME := $(shell date +"%Y-%m-%d %T.%N")
endif
sub-make: FORCE
@echo MAKE START: $(START_DATE_TIME)
$(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
-f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
ifeq ($(WIN_PLAT),y)
@echo MAKE END: %date% %time%
ifneq ($(wildcard tools/timediff.bat),)
@tools/timediff.bat "%time%" "$(START_TIME)"
endif
else
@echo MAKE END: $$(date +"%Y-%m-%d %T.%N")
@printf "MAKE TIME: %.2f seconds\n" $$(echo "$$(date +%s.%N) - $(START_TIME)" | bc)
endif
# Leave processing to above invocation of make
skip-makefile := 1
endif # ifneq ($(KBUILD_OUTPUT),)
endif # ifeq ($(KBUILD_SRC),)
# We process the rest of the Makefile if this is the final invocation of make
ifeq ($(skip-makefile),)
# Do not print "Entering directory ...",
# but we want to display it when entering to the output directory
# so that IDEs/editors are able to understand relative filenames.
MAKEFLAGS += --no-print-directory
# If building an external module we do not care about the all: rule
# but instead _all depend on modules
PHONY += all
_all: all
ifeq ($(KBUILD_SRC),)
# building in the source tree
srctree := .
else
ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
# building in a subdirectory of the source tree
srctree := ..
else
ifeq ($(KBUILD_SRC)/,$(dir $(patsubst %/,%,$(dir $(CURDIR)))))
srctree := ../..
else
srctree := $(KBUILD_SRC)
endif
endif
endif
objtree := .
src := $(srctree)
obj := $(objtree)
VPATH := $(srctree)
export srctree objtree VPATH
# Git revision
ifeq ($(WIN_PLAT),y)
GIT_REVISION := $(shell (where git >nul 2>&1) && (git rev-parse --short HEAD 2>nul))
else
GIT_REVISION := $(shell (which git >/dev/null 2>&1) && (git rev-parse --short HEAD 2>/dev/null))
endif
ifneq ($(GIT_REVISION),)
ifeq ($(WIN_PLAT),y)
GIT_REVISION := $(GIT_REVISION)$(shell (git diff --quiet && git diff --cached --quiet) >nul 2>&1 || echo -dirty)
else
GIT_REVISION := $(GIT_REVISION)$(shell (git diff --quiet && git diff --cached --quiet) >/dev/null 2>&1 || echo -dirty)
endif
endif
# Cross compiling and selecting different set of gcc/bin-utils
# ---------------------------------------------------------------------------
#
# When performing cross compilation for other architectures ARCH shall be set
# to the target architecture. (See arch/* for the possibilities).
# ARCH can be set during invocation of make:
# make ARCH=ia64
# Another way is to have ARCH set in the environment.
# The default ARCH is the host where make is executed.
# CROSS_COMPILE specify the prefix used for all executables used
# during compilation. Only gcc and related bin-utils executables
# are prefixed with $(CROSS_COMPILE).
# CROSS_COMPILE can be set on the command line
# make CROSS_COMPILE=ia64-linux-
# Alternatively CROSS_COMPILE can be set in the environment.
# A third alternative is to store a setting in .config so that plain
# "make" in the configured kernel build directory always uses that.
# Default value for CROSS_COMPILE is not to prefix executables
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
ARCH ?= arm
CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
# SHELL used by kbuild
ifneq ($(WIN_PLAT),y)
CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
else if [ -x /bin/bash ]; then echo /bin/bash; \
else echo sh; fi ; fi)
endif
# Make variables (CC, etc...)
ifeq ($(TOOLCHAIN),armclang)
CC = armclang --target=arm-arm-none-eabi
CPP = $(CC) -E
AS = $(CC)
C++ = $(CC)
LD = $(CC)
AR = armar
NM = fromelf
STRIP = fromelf
OBJCOPY = fromelf
OBJDUMP = fromelf
else
AS = $(CROSS_COMPILE)as
CC = $(CROSS_COMPILE)gcc
CPP = $(CC) -E
C++ = $(CROSS_COMPILE)g++
LD = $(CC)
#LD = $(CROSS_COMPILE)ld
AR = $(CROSS_COMPILE)ar
NM = $(CROSS_COMPILE)nm
STRIP = $(CROSS_COMPILE)strip
OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
endif
AWK = awk
PERL = perl
PYTHON = python
KBUILD_CPPFLAGS :=
KBUILD_CFLAGS := -fno-common -fmessage-length=0 -Wall \
-fno-exceptions -ffunction-sections \
-fdata-sections -fomit-frame-pointer
# By default char on ARM platform is unsigned char, but char on x86 platform
# is signed char. To avoid porting issues, force char to be signed char
# on ARM platform.
KBUILD_CFLAGS += -fsigned-char
ifneq ($(TOOLCHAIN),armclang)
# 1) Avoid checking out-of-bound array accesses in a loop
# (and unrolling/peeling/exiting the loop based on the check)
# 2) Avoid detecting paths dereferencing a NULL pointer
# (and turning the problematic statement into a trap)
KBUILD_CFLAGS += -fno-aggressive-loop-optimizations \
-fno-isolate-erroneous-paths-dereference
endif
# Treat floating-point constants as float instead of double
ifeq ($(TOOLCHAIN),armclang)
KBUILD_CFLAGS += -cl-single-precision-constant -fshort-enums
else
KBUILD_CFLAGS += -fsingle-precision-constant
endif
KBUILD_CFLAGS += -Wdouble-promotion -Wfloat-conversion
KBUILD_CFLAGS += -g
#C_ONLY_FLAGS := -std=gnu89
C_ONLY_FLAGS := -std=gnu99
C++_ONLY_FLAGS := -std=gnu++98 -fno-rtti
KBUILD_AFLAGS := -D__ASSEMBLY__
export ARCH CROSS_COMPILE AS LD CC
export CPP C++ AR NM STRIP OBJCOPY OBJDUMP
export MAKE AWK PERL PYTHON
export KBUILD_CPPFLAGS NOSTDINC_FLAGS OBJCOPYFLAGS LDFLAGS
export KBUILD_CFLAGS
export KBUILD_AFLAGS
export KBUILD_ARFLAGS
export C_ONLY_FLAGS C++_ONLY_FLAGS
# Files to ignore in find ... statements
export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
-name CVS -o -name .pc -o -name .hg -o -name .git \) \
-prune -o
export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
--exclude CVS --exclude .pc --exclude .hg --exclude .git
# ===========================================================================
# Build targets only.
# Objects we will link into $(IMAGE_FILE) / subdirs we need to visit
init-y := init/
core-y := main/
LDS_FILE := best1000.lds
# Link flags for all LD processes
LINK_CFLAGS :=
export LINK_CFLAGS
# Link flags for image only
LIB_LDFLAGS :=
CFLAGS_IMAGE := -static
ifeq ($(TOOLCHAIN),armclang)
LDFLAGS_IMAGE := --no_locals
else
LDFLAGS_IMAGE := -X --no-wchar-size-warning
endif
# Include target definitions
include $(srctree)/$(TARGET_CFG_FILE)
include $(srctree)/$(TARGET_COMMON_FILE)
$(srctree)/$(TARGET_CFG_FILE): ;
$(srctree)/$(TARGET_COMMON_FILE): ;
ifneq ($(filter-out %/,$(init-y) $(core-y)),)
$(error The object files cannot be linked at top level: $(filter-out %/,$(init-y) $(core-y)))
endif
ifeq ($(TOOLCHAIN),armclang)
# Entry objects
ifeq ($(entry-y),)
entry-y += utils/boot_struct/boot_struct.o
ifeq ($(ROM_BUILD),1)
entry-y += tests/rom/startup_ARMCM.o
ifneq ($(filter tests/rom/,$(core-y)),)
entry-y += tests/rom/export_fn_rom.o
endif
else # !ROM_BUILD
entry-y += platform/cmsis/retarget_armclang_asm.o
ifeq ($(PROGRAMMER),1)
entry-y += tests/programmer/sys_api_programmer.o
else
entry-y += platform/main/startup_main.o
endif
endif # !ROM_BUILD
endif
ifeq ($(filter %.o,$(entry-y)),)
$(error Entry objects must be defined in entry-y in target.mk)
endif
BAD_ENTRY_OBJS := $(filter-out %.o,$(entry-y))
ifneq ($(BAD_ENTRY_OBJS),)
$(error Only objects can be defined in entry-y in target.mk: $(BAD_ENTRY_OBJS))
endif
IMAGE_ENTRY := $(entry-y)
ifeq ($(ROM_BUILD),1)
CFLAGS_IMAGE += -e Reset_Handler
else ifeq ($(PROGRAMMER),1)
CFLAGS_IMAGE += -e programmer_start
else
CFLAGS_IMAGE += -e __main
endif
endif
ifneq ($(NO_BUILDID),1)
ifneq ($(TOOLCHAIN),armclang)
LDFLAGS_IMAGE += --build-id
endif
endif
ifeq ($(CROSS_REF),1)
ifeq ($(TOOLCHAIN),armclang)
LDFLAGS_IMAGE += --xref
else
LDFLAGS_IMAGE += --cref
endif
endif
REAL_LDS_FILE := $(LDS_FILE)
ifeq ($(TOOLCHAIN),armclang)
SCATTER_LDS_SUFFIX := _scat
ifeq ($(filter %$(SCATTER_LDS_SUFFIX),$(LDS_FILE)),)
REAL_LDS_FILE := $(LDS_FILE)$(SCATTER_LDS_SUFFIX)
endif
endif
# Generate REVISION_INFO (might be defined in target)
ifeq ($(REVISION_INFO),)
ifeq ($(CUST_TGT_INFO),)
REVISION_INFO := $(GIT_REVISION):$(T)
else
REVISION_INFO := $(GIT_REVISION):$(CUST_TGT_INFO)
endif
endif
include $(srctree)/scripts/include.mk
REVISION_INFO := $(subst $(space),-,$(strip $(REVISION_INFO)))
SOFTWARE_VERSION := $(subst $(space),-,$(strip $(SOFTWARE_VERSION)))
$(info -------------------------------)
$(info REVISION_INFO: $(REVISION_INFO))
$(info -------------------------------)
# Build host and user info
ifeq ($(WIN_PLAT),y)
export BUILD_HOSTNAME := $(COMPUTERNAME)
export BUILD_USERNAME := $(USERNAME)
else
export BUILD_HOSTNAME := $(shell hostname -s)
export BUILD_USERNAME := $(shell id -un)
endif
BUILD_HOSTNAME := $(subst $(space),-,$(strip $(BUILD_HOSTNAME)))
BUILD_USERNAME := $(subst $(space),-,$(strip $(BUILD_USERNAME)))
# Default kernel image to build when no specific target is given.
# IMAGE_FILE may be overruled on the command line or
# set in the environment
IMAGE_FILE ?= $(notdir $(T)).elf
ifneq ($(filter .map .bin .hex .lst,$(suffix $(IMAGE_FILE))),)
$(error Invalid IMAGE_FILE (conflicted suffix): $(IMAGE_FILE))
endif
LST_SECTION_OPTS :=
LST_SECTION_NAME :=
ifneq ($(LST_ONLY_SECTION),)
ifeq ($(TOOLCHAIN),armclang)
LST_SECTION_OPTS += $(foreach m,$(subst $(comma),$(space),$(LST_ONLY_SECTION)),--only=$m )
else
LST_SECTION_OPTS += $(foreach m,$(subst $(comma),$(space),$(LST_ONLY_SECTION)),-j $m )
endif
LST_SECTION_NAME := _$(subst *,+,$(subst !,-,$(LST_ONLY_SECTION)))
endif
ifneq ($(LST_RM_SECTION),)
ifeq ($(TOOLCHAIN),armclang)
LST_SECTION_OPTS += $(foreach m,$(subst $(comma),$(space),$(LST_RM_SECTION)),--ignore_section=$m )
else
LST_SECTION_OPTS += $(foreach m,$(subst $(comma),$(space),$(LST_RM_SECTION)),-R $m )
endif
LST_SECTION_NAME := $(LST_SECTION_NAME)_no_$(subst *,+,$(subst !,-,$(LST_RM_SECTION)))
endif
IMAGE_MAP := $(addsuffix .map,$(basename $(IMAGE_FILE)))
IMAGE_BIN := $(addsuffix .bin,$(basename $(IMAGE_FILE)))
STR_BIN := $(addsuffix .str,$(basename $(IMAGE_FILE)))
IMAGE_HEX := $(addsuffix .hex,$(basename $(IMAGE_FILE)))
ifeq ($(LST_SECTION_OPTS),)
IMAGE_LST := $(addsuffix .lst,$(basename $(IMAGE_FILE)))
else
IMAGE_LST := $(addsuffix $(LST_SECTION_NAME).lst,$(basename $(IMAGE_FILE)))
IMAGE_SEC := $(addsuffix $(LST_SECTION_NAME)$(suffix $(IMAGE_FILE)),$(basename $(IMAGE_FILE)))
endif
LDS_TARGET := _$(notdir $(REAL_LDS_FILE))
IMAGE_VER := build_info.o
targets := $(LDS_TARGET) $(IMAGE_FILE) $(IMAGE_BIN) $(STR_BIN) $(IMAGE_LST) $(IMAGE_VER)
cmd_files := $(wildcard $(foreach f,$(targets),$(call get_depfile_name,$(f))))
ifneq ($(cmd_files),)
include $(cmd_files)
$(cmd_files): ;
endif
# The all: target is the default when no target is given on the
# command line.
# This allow a user to issue only 'make' to build a kernel including modules
# Defaults to $(IMAGE_BIN)
ifeq ($(TRACE_STR_SECTION),1)
all: $(IMAGE_BIN) $(STR_BIN) ;
else
all: $(IMAGE_BIN) ;
endif
ifeq ($(TOOLCHAIN),armclang)
cmd_gen-IMAGE_BIN = $(OBJCOPY) --bincombined -o $@ $<
else
cmd_gen-IMAGE_BIN = $(OBJCOPY) -R .trc_str -O binary $< $@
endif
quiet_cmd_gen-IMAGE_BIN = GENBIN $@
$(IMAGE_BIN): $(IMAGE_FILE)
ifneq ($(filter 1,$(COMPILE_ONLY) $(NO_BIN)),)
@:
else
+$(call if_changed,gen-IMAGE_BIN)
endif
ifeq ($(TOOLCHAIN),armclang)
cmd_gen-STR_BIN = $(OBJCOPY) --bincombined -o $@ $<
else
cmd_gen-STR_BIN = $(OBJCOPY) -j .code_start_addr -j .rodata_str -j .trc_str \
--change-section-lma .code_start_addr=0x00000000 \
--change-section-lma .rodata_str=0x00000010 \
--change-section-lma .trc_str=0x00008000 \
-O binary $< $@
endif
quiet_cmd_gen-STR_BIN = GENBIN $@
$(STR_BIN): $(IMAGE_FILE)
ifneq ($(filter 1,$(COMPILE_ONLY) $(NO_BIN)),)
@:
else
+$(call if_changed,gen-STR_BIN)
endif
ifneq ($(TOOLCHAIN),armclang)
cmd_gen-IMAGE_HEX = $(OBJCOPY) -O ihex $< $@
quiet_cmd_gen-IMAGE_HEX = GENHEX $@
$(IMAGE_HEX): $(IMAGE_FILE)
ifeq ($(COMPILE_ONLY),1)
@:
else
+$(call if_changed,gen-IMAGE_HEX)
endif
endif
PHONY += lst lst_only
lst lst_only: $(IMAGE_LST) ;
ifneq ($(filter lst_only,$(MAKECMDGOALS)),)
NO_COMPILE := 1
endif
ifeq ($(TOOLCHAIN),armclang)
cmd_gen-IMAGE_LST = $(OBJDUMP) $(LST_SECTION_OPTS) --datasymbols --text -c -d --output=$@ $<
else
ifeq ($(LST_SECTION_OPTS),)
cmd_gen-IMAGE_LST = $(OBJDUMP) -Sldx $< > $@
else
cmd_gen-IMAGE_LST = $(OBJCOPY) $(LST_SECTION_OPTS) $< $(IMAGE_SEC) && $(OBJDUMP) -Sldx $(IMAGE_SEC) > $@
endif
endif
quiet_cmd_gen-IMAGE_LST = GENLST $@
$(IMAGE_LST): $(IMAGE_FILE)
+$(call if_changed,gen-IMAGE_LST)
# Flags
# arch Makefile may override CC so keep this after arch Makefile is included
#ifeq ($(CONFIG_STRICT_CFLAGS),y)
#NOSTDINC_FLAGS += -nostdinc
#endif
#NOSTDINC_FLAGS += -isystem "$(subst \,/,$(shell $(CC) -print-file-name=include))"
ifeq ($(CONFIG_STRICT_CFLAGS),y)
# warn about C99 declaration after statement
#C_ONLY_FLAGS += -Wdeclaration-after-statement
# disallow errors like 'EXPORT_GPL(foo);' with missing header
C_ONLY_FLAGS += -Werror=implicit-int
# require functions to have arguments in prototypes, not empty 'int foo()'
#C_ONLY_FLAGS += -Werror=strict-prototypes
C_ONLY_FLAGS += -Werror-implicit-function-declaration
# Prohibit date/time macros, which would make the build non-deterministic
KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
KBUILD_CFLAGS += $(call cc-option,-Wlogical-op)
#KBUILD_CFLAGS += -Wno-address-of-packed-member
KBUILD_CFLAGS += -Wno-trigraphs \
-fno-strict-aliasing \
-Wno-format-security
#KBUILD_CFLAGS += Wundef
# use the deterministic mode of AR if available
KBUILD_ARFLAGS := D
include $(srctree)/scripts/extrawarn.mk
endif # CONFIG_STRICT_CFLAGS
ifeq ($(TOOLCHAIN),armclang)
KBUILD_CFLAGS += -Wno-typedef-redefinition
endif
# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
KBUILD_CPPFLAGS += $(KCPPFLAGS)
KBUILD_AFLAGS += $(KAFLAGS)
KBUILD_CFLAGS += $(KCFLAGS)
IMAGE-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(core-y)))
submodgoals =
ifneq ($(SUBMODS),)
include $(srctree)/scripts/submods.mk
IMAGE-builddirs := $(call get_subdirs,$(IMAGE-dirs),$(SUBMODS))
ifeq ($(COMPILE_ONLY),1)
submodgoals = $(call get_submodgoals,$@,$(SUBMODS))
endif
else
IMAGE-builddirs := $(IMAGE-dirs)
endif
IMAGE-alldirs := $(sort $(IMAGE-dirs) $(patsubst %/,%,$(filter %/, \
$(init-) $(core-) $(extra-))))
init-y := $(patsubst %/, %/built-in$(built_in_suffix), $(init-y))
core-y := $(patsubst %/, %/built-in$(built_in_suffix), $(core-y))
IMAGE_INIT := $(init-y)
IMAGE_MAIN := $(core-y)
ifeq ($(NO_COMPILE),1)
IMAGE-deps :=
else
IMAGE-deps := $(LDS_TARGET) $(IMAGE_INIT) $(IMAGE_MAIN) $(IMAGE_VER)
endif
BUILD_INFO_FLAGS := \
-DREVISION_INFO=$(REVISION_INFO) \
-DFLASH_SIZE=$(FLASH_SIZE) \
-DOTA_UPGRADE_CRC_LOG_SIZE=$(OTA_UPGRADE_CRC_LOG_SIZE) \
-DNV_REC_DEV_VER=$(NV_REC_DEV_VER) \
-I$(srctree)/platform/hal
BUILD_INFO_FLAGS += $(LDS_SECTION_FLAGS)
BUILD_INFO_FLAGS += -DCHIP=$(CHIP)
ifneq ($(CHIP_SUBTYPE),)
BUILD_INFO_FLAGS += -DCHIP_SUBTYPE=$(CHIP_SUBTYPE)
endif
ifneq ($(SOFTWARE_VERSION),)
BUILD_INFO_FLAGS += -DSOFTWARE_VERSION=$(SOFTWARE_VERSION)
endif
ifneq ($(OTA_BOOT_SIZE),0)
BUILD_INFO_FLAGS += -DOTA_BOOT_SIZE=$(OTA_BOOT_SIZE)
endif
ifneq ($(OTA_CODE_OFFSET),)
BUILD_INFO_FLAGS += -DOTA_CODE_OFFSET=$(OTA_CODE_OFFSET)
endif
ifneq ($(OTA_REMAP_OFFSET),)
BUILD_INFO_FLAGS += -DOTA_REMAP_OFFSET=$(OTA_REMAP_OFFSET)
endif
ifeq ($(CRC32_OF_IMAGE),1)
BUILD_INFO_FLAGS += -DCRC32_OF_IMAGE
endif
ifeq ($(TRACE_CRLF),1)
BUILD_INFO_FLAGS += -DTRACE_CRLF
endif
BUILD_INFO_FLAGS += -DKERNEL=$(KERNEL)
quiet_cmd_image_ver = CC $(IMAGE_VER)
cmd_image_ver = $(CC) $(filter-out -Werror=date-time, \
$(call flags,KBUILD_CPPFLAGS) \
$(call flags,KBUILD_CFLAGS) \
$(call flags,C_ONLY_FLAGS) \
$(NOSTDINC_FLAGS)) \
$(BUILD_INFO_FLAGS) \
-MD -MP -MF $(depfile) -MT $@ \
-c -o $@ $<
IMAGE_VER_SRC := $(src)/utils/build_info/build_info.c
$(IMAGE_VER): $(IMAGE_VER_SRC) $(filter-out $(IMAGE_VER),$(IMAGE-deps)) FORCE
$(call if_changed_dep,image_ver)
# Linker scripts preprocessor (.lds.S -> .lds)
# ---------------------------------------------------------------------------
quiet_cmd_cpp_lds_S = LDS $@
cmd_cpp_lds_S = $(CPP) $(call flags,KBUILD_CPPFLAGS) \
$(call flags,CPPFLAGS_$(LDS_FILE)) \
-MD -MP -MF $(depfile) -MT $@ \
$(NOSTDINC_FLAGS) \
-P -C -E -x c -o $@ $<
LDS_SRC_STEM := $(src)/scripts/link/$(REAL_LDS_FILE)
LDS_SRC := $(firstword $(wildcard $(LDS_SRC_STEM).S $(LDS_SRC_STEM).sx) $(LDS_SRC_STEM).S)
$(LDS_TARGET): $(LDS_SRC) FORCE
$(call if_changed_dep,cpp_lds_S)
PHONY += lds
lds: $(LDS_TARGET) ;
# Final link of $(IMAGE_FILE)
# ---------------------------------------------------------------------------
#
# 1) Link the archives twice to solve circular references between two or
# more archives. Otherwise we should use --start-group and --end-group
# options. Normally, an archive is searched only once in the order that
# it is specified on the command line.
# 2) Use --whole-archive option to solve weak symbol overriding issue.
# It tells LD to include every object file in the archive in the link,
# rather than searching the archive for the required object files.
# By default the strong symbols defined in the archive will not override
# any weak symbol, for LD only searches the archive if there is a undefined
# symbol (and a weak symbol is considered as a defined symbol).
#
ifeq ($(TOOLCHAIN),armclang)
#LDFLAGS_IMAGE += --symbols --list_mapping_symbols
ifeq ($(KBUILD_VERBOSE),1)
LDFLAGS_IMAGE += --verbose
endif
cmd_link-IMAGE_FILE = $(LD) -o $@ \
$(CFLAGS_IMAGE) \
-Wl,$(subst $(space),$(comma),$(strip \
$(LDFLAGS) $(LDFLAGS_IMAGE) \
--scatter=$(LDS_TARGET) \
--list=$(IMAGE_MAP) \
--info=summarysizes --info=summarystack --info=totals --info=unused \
--map --load_addr_map_info \
--remove --no_autoat \
--emit_debug_overlay_relocs --emit_debug_overlay_section \
--diag_style=gnu --diag_suppress=L6314 --diag_suppress=L6329)) \
$(IMAGE_ENTRY) $(IMAGE_INIT) $(IMAGE_MAIN) $(IMAGE_VER) \
$(LIB_LDFLAGS) $(LIB_LDFLAGS)
else
cmd_link-IMAGE_FILE = $(LD) -o $@ \
$(LD_USE_PATCH_SYMBOL) \
-T $(LDS_TARGET) \
$(CFLAGS_IMAGE) \
-Wl,$(subst $(space),$(comma),$(strip \
$(LDFLAGS) $(LDFLAGS_IMAGE) \
-Map=$(IMAGE_MAP) \
--gc-sections \
--whole-archive)) \
$(IMAGE_INIT) $(IMAGE_MAIN) $(IMAGE_VER) \
-Wl,--no-whole-archive $(LIB_LDFLAGS) $(LIB_LDFLAGS)
endif
quiet_cmd_link-IMAGE_FILE = LINK $@
# Include targets which we want to
# execute if the rest of the kernel build went well.
$(IMAGE_FILE): $(IMAGE-deps) FORCE
ifneq ($(filter 1,$(COMPILE_ONLY) $(NO_COMPILE)),)
@:
else
+$(call if_changed,link-IMAGE_FILE)
endif
ifneq ($(IMAGE-deps),)
# The actual objects are generated when descending,
# make sure no implicit rule kicks in
$(sort $(filter %/built-in$(built_in_suffix),$(IMAGE-deps))): $(IMAGE-builddirs) ;
endif
# Handle descending into subdirectories listed in $(IMAGE-dirs)
# Preset locale variables to speed up the build process. Limit locale
# tweaks to this spot to avoid wrong language settings when running
# make menuconfig etc.
# Error messages still appears in the original language
PHONY += $(IMAGE-dirs)
$(IMAGE-dirs): scripts
$(Q)$(MAKE) $(build)=$@ $(submodgoals)
# clean - Delete most, but leave enough to build external modules
#
clean: rm-dirs := $(CLEAN_DIRS)
clean: rm-files := $(CLEAN_FILES)
ifneq ($(SUBMODS),)
clean-dirs := $(addprefix _clean_, $(IMAGE-builddirs))
else
clean-dirs := $(addprefix _clean_, $(IMAGE-alldirs))
endif
PHONY += $(clean-dirs) clean IMAGE-clean
$(clean-dirs):
$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
IMAGE-clean:
$(Q)$(call CMDRMFILE,$(IMAGE_FILE) $(IMAGE_MAP) \
$(IMAGE_BIN) $(STR_BIN) $(IMAGE_HEX) $(IMAGE_LST) \
$(IMAGE_VER) $(LDS_TARGET))
clean: IMAGE-clean
clean: $(clean-dirs)
$(call cmd,rmdirs)
$(call cmd,rmfiles)
ifeq ($(SUBMODS),)
$(Q)$(call CMDRMFILER,.,*.o *.a *.s *.d)
endif
PHONY += allclean
ifeq ($(KBUILD_OUTPUT),)
allclean: clean ;
else
ifeq ($(SUBMODS),)
quiet_cmd_clean = RMDIR $(KBUILD_OUTPUT)
cmd_clean = $(call CMDRMDIR,$(KBUILD_OUTPUT))
allclean:
+$(call cmd,clean)
else
allclean: clean ;
endif
endif
quiet_cmd_predefined-macros = GEN $@
cmd_predefined-macros = $(CPP) $(filter-out -I% -D% -include%,$(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(C_ONLY_FLAGS)) \
-x c -E -dM -o $@ $(devnull)
PREDEF_MACRO_FILE := predefined-macros.txt
$(PREDEF_MACRO_FILE): FORCE
$(call cmd,predefined-macros)
PHONY += predefined-macros
predefined-macros: $(PREDEF_MACRO_FILE) ;
# FIXME Should go into a make.lib or something
# ===========================================================================
quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
cmd_rmdirs = $(if $(wildcard $(rm-dirs)),$(call CMDRMDIR,$(rm-dirs)))
quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
cmd_rmfiles = $(if $(wildcard $(rm-files)),$(call CMDRMFILE,$(rm-files)))
# Shorthand for $(Q)$(MAKE) -f scripts/clean.mk obj=dir
# Usage:
# $(Q)$(MAKE) $(clean)=dir
clean := -f $(srctree)/scripts/clean.mk obj
ifneq ($(WIN_PLAT),y)
# Generate tags for editors
# ---------------------------------------------------------------------------
quiet_cmd_tags = GEN $@
cmd_tags = $(CONFIG_SHELL) $(srctree)/tools/tags.sh $@
tags TAGS cscope gtags: FORCE
$(call cmd,tags)
endif
HELP_TARGET := 2
endif # ifeq ($(skip-makefile),)
endif # ifneq ($(HELP_TARGET),1)
# Help target
ifneq ($(HELP_TARGET),)
ifeq ($(HELP_TARGET),1)
include scripts/include.mk
endif
help: FORCE
$(call echo-help,Mandatory options:)
$(call echo-help, T=<targetBoard> - Select a target board configuration in config/)
$(call echo-help,)
$(call echo-help,Cleaning targets:)
$(call echo-help, clean - Remove most generated files)
$(call echo-help, allclean - Remove all generated files and the output directory if possible)
$(call echo-help,)
$(call echo-help,Generic targets:)
$(call echo-help, all - Build all targets marked with [*])
$(call echo-help, lst - Build the mixed source/assembly file of the final image)
$(call echo-help, lds - Build the linker script file)
ifeq ($(HELP_TARGET),2)
$(call echo-help,* $(IMAGE_FILE))
$(call echo-help, - Build the final image)
endif
$(call echo-help, dir/ - Build all files in dir and below)
$(call echo-help, dir/file.[oisS] - Build specified target only)
$(call echo-help, dir/file.lst - Build specified mixed source/assembly target only)
$(call echo-help, (requires a recent binutils and recent build (System.map)))
$(call echo-help,)
$(call echo-help, make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build)
$(call echo-help, make V=2 [targets] 2 => give reason for rebuild of target)
$(call echo-help, make O=dir [targets] Locate all output files in "dir", including .config)
$(call echo-help, make W=n [targets] Enable extra gcc checks, n=1,2,3 where)
$(call echo-help, 1: warnings which may be relevant and do not occur too often)
$(call echo-help, 2: warnings which occur quite often but may still be relevant)
$(call echo-help, 3: more obscure warnings, can most likely be ignored)
$(call echo-help, Multiple levels can be combined with W=12 or W=123)
$(call echo-help,)
$(call echo-help,Execute "make" or "make all" to build all targets marked with [*])
endif # ifneq ($(HELP_TARGET),)
# Cancel implicit rules on top Makefile
ifeq ($(KBUILD_SRC),)
$(CURDIR)/Makefile Makefile: ;
else
$(KBUILD_SRC)/Makefile Makefile: ;
endif
PHONY += FORCE
FORCE: ;
# Declare the contents of the .PHONY variable as phony. We keep that
# information in a variable so we can use it in if_changed and friends.
.PHONY: $(PHONY)
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