ARM_GNU_ARCH_LIST := ARM968E-S

THUMB_GNU_ARCH_LIST := Cortex-M0 \
                       Cortex-M3 \
                       Cortex-M4 \
                       Cortex-M4F\
					   Cortex-M7\
                       Cortex-R3


ifneq ($(filter $(HOST_ARCH), $(THUMB_GNU_ARCH_LIST) $(ARM_GNU_ARCH_LIST)),)

ifneq ($(filter $(HOST_ARCH), $(ARM_GNU_ARCH_LIST)),)
HOST_INSTRUCTION_SET := ARM
else
HOST_INSTRUCTION_SET := THUMB
endif

TOOLCHAIN_PATH    ?=
TOOLCHAIN_PREFIX  := arm-none-eabi-
TOOLCHAIN_DEFAULT_FOLDER := gcc-arm-none-eabi

ifneq (,$(wildcard $(COMPILER_ROOT)/$(TOOLCHAIN_DEFAULT_FOLDER)/$(HOST_OS)/bin))
TOOLCHAIN_PATH    := $(COMPILER_ROOT)/$(TOOLCHAIN_DEFAULT_FOLDER)/$(HOST_OS)/bin/
endif

BINS ?=

ifeq ($(HOST_OS),Win32)
################
# Windows settings
################

ifeq (,$(TOOLCHAIN_PATH))
SYSTEM_GCC_PATH = $(shell where $(TOOLCHAIN_PREFIX)gcc.exe)
ifneq (,$(findstring $(TOOLCHAIN_PREFIX)gcc.exe,$(SYSTEM_GCC_PATH)))
TOOLCHAIN_PATH :=
else
DOWNLOAD_URL   = "https://launchpad.net/gcc-arm-embedded/+download"
TOOLCHIAN_FILE = "gcc-arm-none-eabi-5_4-2016q3-20160926-win32.zip"
$(error can not find compiler toolchain, please download $(TOOLCHIAN_FILE) from $(DOWNLOAD_URL) and unzip to $(COMPILER_ROOT)/$(TOOLCHAIN_DEFAULT_FOLDER)/$(HOST_OS) folder)
endif
endif

ifeq ($(findstring stm32, $(HOST_MCU_FAMILY)), stm32)
GDB_KILL_OPENOCD   = shell $(TOOLS_ROOT)/cmd/win32/taskkill /F /IM st-util.exe
GDBINIT_STRING     = shell start /B $(TOOLS_ROOT)/cmd/win32/st-util.exe
GDB_COMMAND        = $(call CONV_SLASHES, $(TOOLCHAIN_PATH))$(TOOLCHAIN_PREFIX)gdb$(EXECUTABLE_SUFFIX)
else
GDB_KILL_OPENOCD   = shell $(TOOLS_ROOT)/cmd/win32/taskkill /F /IM openocd.exe
GDBINIT_STRING     = shell start /B $(OPENOCD_FULL_NAME) -f $(OPENOCD_CFG_PATH)interface/$(JTAG).cfg -f $(OPENOCD_CFG_PATH)$(HOST_OPENOCD)/$(HOST_OPENOCD).cfg -f $(OPENOCD_CFG_PATH)$(HOST_OPENOCD)/$(HOST_OPENOCD)_gdb_jtag.cfg -l $(OPENOCD_LOG_FILE)
GDB_COMMAND        = cmd /C $(call CONV_SLASHES, $(TOOLCHAIN_PATH))$(TOOLCHAIN_PREFIX)gdb$(EXECUTABLE_SUFFIX)
endif

else  # Win32
ifneq (,$(filter $(HOST_OS),Linux32 Linux64))
################
# Linux 32/64-bit settings
################

ifeq (,$(TOOLCHAIN_PATH))
SYSTEM_GCC_PATH = $(shell which $(TOOLCHAIN_PREFIX)gcc)
ifneq (,$(findstring $(TOOLCHAIN_PREFIX)gcc,$(SYSTEM_GCC_PATH)))
TOOLCHAIN_PATH :=
else
DOWNLOAD_URL   = "https://launchpad.net/gcc-arm-embedded/+download"
TOOLCHIAN_FILE = "gcc-arm-none-eabi-5_4-2016q3-20160926-linux.tar.bz2"
$(error can not find compiler toolchain, please download $(TOOLCHIAN_FILE) from $(DOWNLOAD_URL) and unzip to $(COMPILER_ROOT)/$(TOOLCHAIN_DEFAULT_FOLDER)/$(HOST_OS) folder)
endif
endif

ifeq ($(findstring stm32, $(HOST_MCU_FAMILY)), stm32)
GDB_KILL_OPENOCD   = 'shell killall st-util'
GDBINIT_STRING     = 'shell $(COMMON_TOOLS_PATH)st-util &'
GDB_COMMAND        = "$(TOOLCHAIN_PATH)$(TOOLCHAIN_PREFIX)gdb"
else
GDB_KILL_OPENOCD   = 'shell killall openocd'
GDBINIT_STRING     = 'shell $(COMMON_TOOLS_PATH)dash -c "trap \\"\\" 2;$(OPENOCD_FULL_NAME) -f $(OPENOCD_CFG_PATH)interface/$(JTAG).cfg -f $(OPENOCD_CFG_PATH)$(HOST_OPENOCD)/$(HOST_OPENOCD).cfg -f $(OPENOCD_CFG_PATH)$(HOST_OPENOCD)/$(HOST_OPENOCD)_gdb_jtag.cfg -l $(OPENOCD_LOG_FILE) &"'
GDB_COMMAND        = "$(TOOLCHAIN_PATH)$(TOOLCHAIN_PREFIX)gdb"
endif

else # Linux32/64
ifeq ($(HOST_OS),OSX)
################
# OSX settings
################

ifeq (,$(TOOLCHAIN_PATH))
SYSTEM_GCC_PATH = $(shell which $(TOOLCHAIN_PREFIX)gcc)
ifneq (,$(findstring $(TOOLCHAIN_PREFIX)gcc,$(SYSTEM_GCC_PATH)))
TOOLCHAIN_PATH :=
else
DOWNLOAD_URL   = "https://launchpad.net/gcc-arm-embedded/+download"
TOOLCHIAN_FILE = "gcc-arm-none-eabi-5_4-2016q3-20160926-mac.tar.bz2"
$(error can not find compiler toolchain, please download $(TOOLCHIAN_FILE) from $(DOWNLOAD_URL) and unzip to $(COMPILER_ROOT)/$(TOOLCHAIN_DEFAULT_FOLDER)/$(HOST_OS) folder)
endif
endif

ifeq ($(findstring stm32, $(HOST_MCU_FAMILY)), stm32)
GDB_KILL_OPENOCD   = 'shell killall st-util'
GDBINIT_STRING     = 'shell $(COMMON_TOOLS_PATH)st-util &'
GDB_COMMAND        = "$(TOOLCHAIN_PATH)$(TOOLCHAIN_PREFIX)gdb"
else
GDB_KILL_OPENOCD   = 'shell killall openocd_run'
GDBINIT_STRING     = 'shell $(COMMON_TOOLS_PATH)dash -c "trap \\"\\" 2;$(OPENOCD_FULL_NAME) -f $(OPENOCD_CFG_PATH)interface/$(JTAG).cfg -f $(OPENOCD_CFG_PATH)$(HOST_OPENOCD)/$(HOST_OPENOCD).cfg -f $(OPENOCD_CFG_PATH)$(HOST_OPENOCD)/$(HOST_OPENOCD)_gdb_jtag.cfg -l $(OPENOCD_LOG_FILE) &"'
GDB_COMMAND        = "$(TOOLCHAIN_PATH)$(TOOLCHAIN_PREFIX)gdb"
endif

else # OSX
$(error unsupport OS $(HOST_OS))
endif # OSX
endif # Linux32 Linux64 OSX
endif # Win32

# Notes on C++ options:
# The next two CXXFLAGS reduce the size of C++ code by removing unneeded
# features. For example, these flags reduced the size of a console app build
# (with C++ iperf) from 604716kB of flash to 577580kB of flash and 46756kB of
# RAM to 46680kB of RAM.
#
# -fno-rtti
# Disable generation of information about every class with virtual functions for
# use by the C++ runtime type identification features (dynamic_cast and typeid).
# Disabling RTTI eliminates several KB of support code from the C++ runtime
# library (assuming that you don't link with code that uses RTTI).
#
# -fno-exceptions
# Stop generating extra code needed to propagate exceptions, which can produce
# significant data size overhead. Disabling exception handling eliminates
# several KB of support code from the C++ runtime library (assuming that you
# don't link external code that uses exception handling).

CC      := "$(TOOLCHAIN_PATH)$(TOOLCHAIN_PREFIX)gcc$(EXECUTABLE_SUFFIX)"
CXX     := "$(TOOLCHAIN_PATH)$(TOOLCHAIN_PREFIX)g++$(EXECUTABLE_SUFFIX)"
AS      := $(CC)
AR      := "$(TOOLCHAIN_PATH)$(TOOLCHAIN_PREFIX)ar$(EXECUTABLE_SUFFIX)"
LD      := "$(TOOLCHAIN_PATH)$(TOOLCHAIN_PREFIX)ld$(EXECUTABLE_SUFFIX)"
CPP     := "$(TOOLCHAIN_PATH)$(TOOLCHAIN_PREFIX)cpp$(EXECUTABLE_SUFFIX)"
OBJDUMP := "$(TOOLCHAIN_PATH)$(TOOLCHAIN_PREFIX)objdump$(EXECUTABLE_SUFFIX)"
OBJCOPY := "$(TOOLCHAIN_PATH)$(TOOLCHAIN_PREFIX)objcopy$(EXECUTABLE_SUFFIX)"
STRIP   := "$(TOOLCHAIN_PATH)$(TOOLCHAIN_PREFIX)strip$(EXECUTABLE_SUFFIX)"
NM      := "$(TOOLCHAIN_PATH)$(TOOLCHAIN_PREFIX)nm$(EXECUTABLE_SUFFIX)"
READELF := "$(TOOLCHAIN_PATH)$(TOOLCHAIN_PREFIX)readelf$(EXECUTABLE_SUFFIX)"

ADD_COMPILER_SPECIFIC_STANDARD_CFLAGS   = $(1) -Wall -Wfatal-errors -fsigned-char -ffunction-sections -fdata-sections -fno-common -std=gnu11 $(if $(filter yes,$(MXCHIP_INTERNAL) $(TESTER)),-Werror)
ADD_COMPILER_SPECIFIC_STANDARD_CXXFLAGS = $(1) -Wall -Wfatal-errors -fsigned-char -ffunction-sections -fdata-sections -fno-common -fno-rtti -fno-exceptions  $(if $(filter yes,$(MXCHIP_INTERNAL) $(TESTER)),-Werror)
ADD_COMPILER_SPECIFIC_STANDARD_ADMFLAGS = $(1)
COMPILER_SPECIFIC_OPTIMIZED_CFLAGS    := -Os
COMPILER_SPECIFIC_UNOPTIMIZED_CFLAGS  := -O0
COMPILER_SPECIFIC_PEDANTIC_CFLAGS  := $(COMPILER_SPECIFIC_STANDARD_CFLAGS) -Werror -Wstrict-prototypes  -W -Wshadow  -Wwrite-strings -pedantic -std=c99 -U__STRICT_ANSI__ -Wconversion -Wextra -Wdeclaration-after-statement -Wconversion -Waddress -Wlogical-op -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes -Wmissing-declarations -Wmissing-field-initializers -Wdouble-promotion -Wswitch-enum -Wswitch-default -Wuninitialized -Wunknown-pragmas -Wfloat-equal  -Wundef  -Wshadow # -Wcast-qual -Wtraditional -Wtraditional-conversion
COMPILER_SPECIFIC_ARFLAGS_CREATE   := -rcs
COMPILER_SPECIFIC_ARFLAGS_ADD      := -rcs
COMPILER_SPECIFIC_ARFLAGS_VERBOSE  := -v

#debug: no optimize and log enable
COMPILER_SPECIFIC_DEBUG_CFLAGS     := -DDEBUG -ggdb $(COMPILER_SPECIFIC_UNOPTIMIZED_CFLAGS)
COMPILER_SPECIFIC_DEBUG_CXXFLAGS   := -DDEBUG -ggdb $(COMPILER_SPECIFIC_UNOPTIMIZED_CFLAGS)
COMPILER_SPECIFIC_DEBUG_ASFLAGS    := -DDEBUG=1 -ggdb
COMPILER_SPECIFIC_DEBUG_LDFLAGS    := -Wl,--gc-sections -Wl,--cref

#release_log: optimize but log enable
COMPILER_SPECIFIC_RELEASE_LOG_CFLAGS   := -ggdb $(COMPILER_SPECIFIC_OPTIMIZED_CFLAGS)
COMPILER_SPECIFIC_RELEASE_LOG_CXXFLAGS := -ggdb $(COMPILER_SPECIFIC_OPTIMIZED_CFLAGS)
COMPILER_SPECIFIC_RELEASE_LOG_ASFLAGS  := -ggdb
COMPILER_SPECIFIC_RELEASE_LOG_LDFLAGS  := -Wl,--gc-sections -Wl,$(COMPILER_SPECIFIC_OPTIMIZED_CFLAGS) -Wl,--cref

#release: optimize and log disable
COMPILER_SPECIFIC_RELEASE_CFLAGS   := -DNDEBUG -ggdb $(COMPILER_SPECIFIC_OPTIMIZED_CFLAGS)
COMPILER_SPECIFIC_RELEASE_CXXFLAGS := -DNDEBUG -ggdb $(COMPILER_SPECIFIC_OPTIMIZED_CFLAGS)
COMPILER_SPECIFIC_RELEASE_ASFLAGS  := -ggdb
COMPILER_SPECIFIC_RELEASE_LDFLAGS  := -Wl,--gc-sections -Wl,$(COMPILER_SPECIFIC_OPTIMIZED_CFLAGS) -Wl,--cref

COMPILER_SPECIFIC_DEPS_FLAG        := -MD
COMPILER_SPECIFIC_COMP_ONLY_FLAG   := -c
COMPILER_SPECIFIC_LINK_MAP         =  -Wl,-Map,$(1)
COMPILER_SPECIFIC_LINK_FILES       =  -Wl,--whole-archive -Wl,--start-group $(1) -Wl,--end-group -Wl,-no-whole-archive
COMPILER_SPECIFIC_LINK_SCRIPT_DEFINE_OPTION = -Wl$(COMMA)-T
COMPILER_SPECIFIC_LINK_SCRIPT      =  $(addprefix -Wl$(COMMA)-T ,$(1))
LINKER                             := $(CC) --static -Wl,-static -Wl,--warn-common
LINK_SCRIPT_SUFFIX                 := .ld
TOOLCHAIN_NAME := GCC
OPTIONS_IN_FILE_OPTION    := @

ENDIAN_CFLAGS_LITTLE   := -mlittle-endian
ENDIAN_CXXFLAGS_LITTLE := -mlittle-endian
ENDIAN_ASMFLAGS_LITTLE :=
ENDIAN_LDFLAGS_LITTLE  := -mlittle-endian
CLIB_LDFLAGS_NANO      := --specs=nano.specs
ifeq ($(BINS),)
CLIB_LDFLAGS_NANO_FLOAT:= --specs=nano.specs -u _printf_float
else ifeq ($(BINS),kernel)
CLIB_LDFLAGS_NANO_FLOAT:= --specs=nano.specs -u _printf_float
else ifeq ($(BINS),framework)
CLIB_LDFLAGS_NANO_FLOAT:= --specs=nano.specs
else ifeq ($(BINS),app)
CLIB_LDFLAGS_NANO_FLOAT:= --specs=nano.specs
endif

# Chip specific flags for GCC

ifeq ($(HOST_ARCH),Cortex-M4F)
CPU_CFLAGS     := -mthumb -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard
CPU_CXXFLAGS   := -mthumb -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard
CPU_ASMFLAGS   := $(CPU_CFLAGS)
CPU_LDFLAGS    := -mthumb -mcpu=cortex-m4 -Wl,-A,thumb
CLIB_LDFLAGS_NANO       += -mfpu=fpv4-sp-d16 -mfloat-abi=hard
CLIB_LDFLAGS_NANO_FLOAT += -mfpu=fpv4-sp-d16 -mfloat-abi=hard
endif

ifeq ($(HOST_ARCH),Cortex-M4)
CPU_CFLAGS     := -mthumb -mcpu=cortex-m4
CPU_CXXFLAGS   := -mthumb -mcpu=cortex-m4
CPU_ASMFLAGS   := $(CPU_CFLAGS)
CPU_LDFLAGS    := -mthumb -mcpu=cortex-m4 -Wl,-A,thumb
endif

ifeq ($(HOST_ARCH),Cortex-M3)
CPU_CFLAGS   := -mthumb -mcpu=cortex-m3
CPU_CXXFLAGS := -mthumb -mcpu=cortex-m3
CPU_ASMFLAGS   := $(CPU_CFLAGS)
CPU_LDFLAGS  := -mthumb -mcpu=cortex-m3 -Wl,-A,thumb
endif

ifeq ($(HOST_ARCH),Cortex-M0)
CPU_CFLAGS   := -mthumb -mcpu=cortex-m0
CPU_CXXFLAGS := -mthumb -mcpu=cortex-m0
CPU_ASMFLAGS   := $(CPU_CFLAGS)
CPU_LDFLAGS  := -mthumb -mcpu=cortex-m0 -Wl,-A,thumb
endif

ifeq ($(HOST_ARCH),Cortex-R4)
CPU_BASE_FLAGS     := -mcpu=cortex-r4 -mthumb-interwork
CPU_COMPILER_FLAGS := $(CPU_BASE_FLAGS) -mthumb -fno-builtin-memcpy
CPU_CFLAGS         := $(CPU_COMPILER_FLAGS)
CPU_CXXFLAGS       := $(CPU_COMPILER_FLAGS)
CPU_ASMFLAGS       := $(CPU_BASE_FLAGS)
CPU_LDFLAGS        := -mthumb $(CPU_BASE_FLAGS) -Wl,-A,thumb -Wl,-z,max-page-size=0x10 -Wl,-z,common-page-size=0x10
endif

ifeq ($(HOST_ARCH),ARM968E-S)
CPU_BASE_FLAGS     := -mcpu=arm968e-s -march=armv5te -marm -mlittle-endian -mthumb-interwork
CPU_CFLAGS         := $(CPU_BASE_FLAGS)
CPU_CXXFLAGS       := $(CPU_BASE_FLAGS)
CPU_ASMFLAGS       := $(CPU_BASE_FLAGS)
CPU_LDFLAGS        := $(CPU_BASE_FLAGS)
endif

ifeq ($(HOST_ARCH),Cortex-M7)
CPU_CFLAGS     := -mthumb -mcpu=cortex-m7
CPU_CXXFLAGS   := -mthumb -mcpu=cortex-m7
CPU_ASMFLAGS   := $(CPU_CFLAGS)
CPU_LDFLAGS    := -mthumb -mcpu=cortex-m7 -Wl,-A,thumb
endif

# $(1) is map file, $(2) is CSV output file
COMPILER_SPECIFIC_MAPFILE_TO_CSV = $(PYTHON) $(MAPFILE_PARSER) $(1) > $(2)

MAPFILE_PARSER            :=$(MAKEFILES_PATH)/scripts/map_parse_gcc.py

# $(1) is map file, $(2) is CSV output file
COMPILER_SPECIFIC_MAPFILE_DISPLAY_SUMMARY = $(PYTHON) $(MAPFILE_PARSER) $(1)

KILL_OPENOCD_SCRIPT := $(MAKEFILES_PATH)/scripts/kill_openocd.py

KILL_OPENOCD = $(PYTHON) $(KILL_OPENOCD_SCRIPT)

ifneq ($(BINS),)
ifeq ($(HOST_OS),Win32)
DOWNLOAD_BRACKETS := )
DOWNLOAD_COMMA := ;
BINS_DOWNLOAD_ADDR = $(subst $(DOWNLOAD_COMMA),, $(subst $(DOWNLOAD_BRACKETS),, $(filter 0x%, $(subst X,x,$(strip $(shell findstr /d:$(OUTPUT_DIR)/ld "$(BINSTYPE_LOWER)_download_addr" *.ld))))))
READELF_STR         = $(call CONV_SLASHES, $(OUTPUT_DIR)/binary/$(CLEANED_BUILD_STRING).$(BINSTYPE_LOWER)$(LINK_OUTPUT_SUFFIX))
LOAD_SYMBOL_ADDRSTR = $(shell $(READELF) -S $(READELF_STR) | findstr ".text")
LOAD_SYMBOL_ADDR    = 0x$(wordlist 5, 5, $(LOAD_SYMBOL_ADDRSTR))
endif  # Win32
ifeq ($(HOST_OS),Linux32)
BINS_DOWNLOAD_ADDR = `$(TOOLS_ROOT)/cmd/linux32/grep -nr "$(BINSTYPE_LOWER)_download_addr" $(OUTPUT_DIR)/ld | $(TOOLS_ROOT)/cmd/linux32/awk -F '=' '{print $$2}' | $(TOOLS_ROOT)/cmd/linux32/awk -F ')' '{print $$1}'`
LOAD_SYMBOL_ADDR    = 0x`$(READELF) -S $(OUTPUT_DIR)/binary/$(CLEANED_BUILD_STRING).$(BINSTYPE_LOWER)$(LINK_OUTPUT_SUFFIX) | $(TOOLS_ROOT)/cmd/linux32/grep ".text" | $(TOOLS_ROOT)/cmd/linux32/awk '{print $$5}'`
endif  # Linux32
ifeq ($(HOST_OS),Linux64)
BINS_DOWNLOAD_ADDR = `$(TOOLS_ROOT)/cmd/linux64/grep -nr "$(BINSTYPE_LOWER)_download_addr" $(OUTPUT_DIR)/ld | $(TOOLS_ROOT)/cmd/linux64/awk -F '=' '{print $$2}' | $(TOOLS_ROOT)/cmd/linux64/awk -F ')' '{print $$1}'`
LOAD_SYMBOL_ADDR    = 0x`$(READELF) -S $(OUTPUT_DIR)/binary/$(CLEANED_BUILD_STRING).$(BINSTYPE_LOWER)$(LINK_OUTPUT_SUFFIX) | $(TOOLS_ROOT)/cmd/linux64/grep ".text" | $(TOOLS_ROOT)/cmd/linux64/awk '{print $$5}'`
endif  # Linux64
ifeq ($(HOST_OS),OSX)
BINS_DOWNLOAD_ADDR = `$(TOOLS_ROOT)/cmd/osx/grep -nr "$(BINSTYPE_LOWER)_download_addr" $(OUTPUT_DIR)/ld | $(TOOLS_ROOT)/cmd/osx/awk -F '=' '{print $$2}' | $(TOOLS_ROOT)/cmd/osx/awk -F ')' '{print $$1}'`
LOAD_SYMBOL_ADDR    = 0x`$(READELF) -S $(OUTPUT_DIR)/binary/$(CLEANED_BUILD_STRING).$(BINSTYPE_LOWER)$(LINK_OUTPUT_SUFFIX) | $(TOOLS_ROOT)/cmd/osx/grep ".text" | $(TOOLS_ROOT)/cmd/osx/awk '{print $$5}'`
endif  # OSX
SUBGDBINIT_STRING   = add-symbol-file $(BUILD_DIR)/eclipse_debug/$(BINSTYPE_LOWER)_built.elf $(LOAD_SYMBOL_ADDR)
else
BINS_DOWNLOAD_ADDR = 0x13200
endif # BINS

STRIP_OUTPUT_PREFIX := -o 
OBJCOPY_BIN_FLAGS   := -O binary -R .eh_frame -R .init -R .fini -R .comment -R .ARM.attributes 
OBJCOPY_HEX_FLAGS   := -O ihex -R .eh_frame -R .init -R .fini -R .comment -R .ARM.attributes

LINK_OUTPUT_SUFFIX :=.elf
BIN_OUTPUT_SUFFIX  :=.bin
HEX_OUTPUT_SUFFIX  :=.hex

endif #ifneq ($(filter $(HOST_ARCH), Cortex-M3 Cortex-M4),)