# Set to @ if you want to suppress command echo
CMD_ECHO =

# Important directories
BUILD_DIR = ./Build

# Toolchain location and prefix
#TOOLCHAIN =
TOOLCHAIN ?= /opt/gcc-arm-none-eabi/bin/arm-none-eabi-

# Tools selection
CC = $(TOOLCHAIN)gcc
AS = $(CC)
LD = $(CC)
AR = $(TOOLCHAIN)ar
NM = $(TOOLCHAIN)nm
OBJCOPY ?= $(TOOLCHAIN)objcopy
OBJDUMP ?= $(TOOLCHAIN)objdump
SIZE ?= $(TOOLCHAIN)size

# Includes
USER_SETTINGS_DIR ?= ./Header
INC = -I$(USER_SETTINGS_DIR) \
      -I../..

# Defines
DEF = -DWOLFSSL_USER_SETTINGS

# Architecture
ARCHFLAGS ?= -mcpu=cortex-m4 -mthumb -mabi=aapcs -DUSE_WOLF_ARM_STARTUP
#ARCHFLAGS = -mcpu=cortex-m0 -mthumb -mabi=aapcs -DUSE_WOLF_ARM_STARTUP
#ARCHFLAGS = -mcpu=cortex-r5 -mthumb -mabi=aapcs
#ARCHFLAGS = -mcpu=cortex-a53 -mthumb -mabi=aapcs

# Compiler and linker flags
ASFLAGS ?= $(ARCHFLAGS)
CFLAGS_EXTRA ?= -Wno-cpp
CFLAGS ?= $(ARCHFLAGS) -std=gnu99 -Wall $(CFLAGS_EXTRA)
LDFLAGS ?= $(ARCHFLAGS)

FIPS?=1
# LD: Link with nosys
LDFLAGS += --specs=nosys.specs

# LD: Link with nano or rdimon implementation for standard library
LDFLAGS += --specs=nano.specs
#LDFLAGS += --specs=rdimon.specs

# LD: generate map
LDFLAGS += -Wl,-Map=$(BUILD_DIR)/$(BIN).map

# LD: Entry point
LDFLAGS += -Wl,-ereset_handler

# Math lib (for DH)
LIBS = -lm

# Memory Map
SRC_LD = -T./linker.ld

# Optimization level and place functions / data into separate sections to allow dead code removal
CFLAGS += -Os -ffunction-sections -fdata-sections -fno-builtin
# Remove unused sections and link time optimizations
LDFLAGS += -Wl,--gc-sections -flto

# Debugging
#DBGFLAGS = -ggdb -g3
CFLAGS += $(DBGFLAGS)
LDFLAGS += $(DBGFLAGS)


# FILES

# Port and Test/Benchmark
ifndef NO_EXAMPLES
SRC_C += ./Source/wolf_main.c
SRC_C += ./Source/armtarget.c
SRC_C += ../../wolfcrypt/test/test.c
SRC_C += ../../wolfcrypt/benchmark/benchmark.c
endif

# WOLFSSL TLS FILES
SRC_C += ../../src/bio.c
SRC_C += ../../src/crl.c
SRC_C += ../../src/internal.c
SRC_C += ../../src/keys.c
SRC_C += ../../src/ocsp.c
SRC_C += ../../src/sniffer.c
SRC_C += ../../src/ssl.c
SRC_C += ../../src/tls.c
SRC_C += ../../src/tls13.c
SRC_C += ../../src/wolfio.c

# wolfCrypt Core (FIPS)
ifeq "$(FIPS)" "1"
SRC_C += ../../wolfcrypt/src/wolfcrypt_first.c
endif
SRC_C += ../../wolfcrypt/src/aes.c
SRC_C += ../../wolfcrypt/src/cmac.c
SRC_C += ../../wolfcrypt/src/des3.c
SRC_C += ../../wolfcrypt/src/dh.c
SRC_C += ../../wolfcrypt/src/ecc.c
SRC_C += ../../wolfcrypt/src/hmac.c
SRC_C += ../../wolfcrypt/src/kdf.c
SRC_C += ../../wolfcrypt/src/random.c
SRC_C += ../../wolfcrypt/src/rsa.c
SRC_C += ../../wolfcrypt/src/sha.c
SRC_C += ../../wolfcrypt/src/sha256.c
SRC_C += ../../wolfcrypt/src/sha512.c
SRC_C += ../../wolfcrypt/src/sha3.c
ifeq "$(FIPS)" "1"
SRC_C += ../../wolfcrypt/src/fips.c
SRC_C += ../../wolfcrypt/src/fips_test.c
SRC_C += ../../wolfcrypt/src/wolfcrypt_last.c
endif

# wolfCrypt Additional
SRC_C += ../../wolfcrypt/src/asm.c
SRC_C += ../../wolfcrypt/src/asn.c
SRC_C += ../../wolfcrypt/src/blake2s.c
SRC_C += ../../wolfcrypt/src/chacha.c
SRC_C += ../../wolfcrypt/src/chacha20_poly1305.c
SRC_C += ../../wolfcrypt/src/coding.c
SRC_C += ../../wolfcrypt/src/compress.c
SRC_C += ../../wolfcrypt/src/cpuid.c
SRC_C += ../../wolfcrypt/src/cryptocb.c
SRC_C += ../../wolfcrypt/src/curve25519.c
SRC_C += ../../wolfcrypt/src/curve448.c
SRC_C += ../../wolfcrypt/src/ecc_fp.c
SRC_C += ../../wolfcrypt/src/eccsi.c
SRC_C += ../../wolfcrypt/src/ed25519.c
SRC_C += ../../wolfcrypt/src/ed448.c
SRC_C += ../../wolfcrypt/src/error.c
SRC_C += ../../wolfcrypt/src/evp.c
SRC_C += ../../wolfcrypt/src/fe_448.c
SRC_C += ../../wolfcrypt/src/fe_low_mem.c
SRC_C += ../../wolfcrypt/src/fe_operations.c
SRC_C += ../../wolfcrypt/src/ge_448.c
SRC_C += ../../wolfcrypt/src/ge_low_mem.c
SRC_C += ../../wolfcrypt/src/ge_operations.c
SRC_C += ../../wolfcrypt/src/hash.c
SRC_C += ../../wolfcrypt/src/integer.c
SRC_C += ../../wolfcrypt/src/logging.c
SRC_C += ../../wolfcrypt/src/md5.c
SRC_C += ../../wolfcrypt/src/memory.c
SRC_C += ../../wolfcrypt/src/misc.c
SRC_C += ../../wolfcrypt/src/pkcs12.c
SRC_C += ../../wolfcrypt/src/pkcs7.c
SRC_C += ../../wolfcrypt/src/poly1305.c
SRC_C += ../../wolfcrypt/src/pwdbased.c
SRC_C += ../../wolfcrypt/src/rc2.c
SRC_C += ../../wolfcrypt/src/sakke.c
SRC_C += ../../wolfcrypt/src/signature.c
SRC_C += ../../wolfcrypt/src/srp.c
SRC_C += ../../wolfcrypt/src/sp_arm32.c
SRC_C += ../../wolfcrypt/src/sp_arm64.c
SRC_C += ../../wolfcrypt/src/sp_armthumb.c
SRC_C += ../../wolfcrypt/src/sp_c32.c
SRC_C += ../../wolfcrypt/src/sp_c64.c
SRC_C += ../../wolfcrypt/src/sp_cortexm.c
SRC_C += ../../wolfcrypt/src/sp_dsp32.c
SRC_C += ../../wolfcrypt/src/sp_int.c
SRC_C += ../../wolfcrypt/src/sp_x86_64.c
SRC_C += ../../wolfcrypt/src/tfm.c
SRC_C += ../../wolfcrypt/src/wc_dsp.c
SRC_C += ../../wolfcrypt/src/wc_encrypt.c
SRC_C += ../../wolfcrypt/src/wc_pkcs11.c
SRC_C += ../../wolfcrypt/src/wc_port.c
SRC_C += ../../wolfcrypt/src/wolfevent.c
SRC_C += ../../wolfcrypt/src/wolfmath.c

ifeq "$(ASYNC)" "1"
SRC_C += ../../wolfcrypt/src/async.c
endif

ifeq "$(SELFTEST)" "1"
SRC_C += ../../wolfcrypt/src/selftest.c
endif

# wolfCrypt non-standard algorithms (disabled by default)
SRC_C += ../../wolfcrypt/src/arc4.c
SRC_C += ../../wolfcrypt/src/blake2b.c
SRC_C += ../../wolfcrypt/src/camellia.c
SRC_C += ../../wolfcrypt/src/dsa.c
SRC_C += ../../wolfcrypt/src/md2.c
SRC_C += ../../wolfcrypt/src/md4.c
SRC_C += ../../wolfcrypt/src/ripemd.c


FILENAMES_C = $(notdir $(SRC_C))
FILENAMES_C := $(filter-out evp.c, $(FILENAMES_C))
OBJS_C = $(addprefix $(BUILD_DIR)/, $(FILENAMES_C:.c=.o))
vpath %.c $(dir $(SRC_C))


build_hex: $(BUILD_DIR) $(BUILD_DIR)/$(BIN).hex
	@echo ""
	$(CMD_ECHO) $(SIZE) $(BUILD_DIR)/$(BIN).elf

build_static: $(BUILD_DIR) $(BUILD_DIR)/$(BIN).a
	@echo ""
	$(CMD_ECHO) $(SIZE) $(BUILD_DIR)/$(BIN).a

$(BUILD_DIR):
	$(CMD_ECHO) mkdir -p $(BUILD_DIR)

$(BUILD_DIR)/$(BIN).hex: $(BUILD_DIR)/$(BIN).elf
	@echo "Generating HEX binary: $(notdir $@)"
	$(CMD_ECHO) $(OBJCOPY) -O ihex $< $@

$(BUILD_DIR)/%.o: %.s
	@echo "Compiling ASM file: $(notdir $<)"
	$(CMD_ECHO) $(AS) $(ASFLAGS) $(DEF) $(INC) -c -o $@ $<

$(BUILD_DIR)/%.o: %.c
	@echo "Compiling C file: $(notdir $<)"
	$(CMD_ECHO) $(CC) $(CFLAGS) $(DEF) $(INC) -c -o $@ $<

$(BUILD_DIR)/$(BIN).elf: $(OBJS_ASM) $(OBJS_C)
	@echo "Linking ELF binary: $(notdir $@)"
	$(CMD_ECHO) $(LD) $(LDFLAGS) $(SRC_LD) -o $@ $^ $(LIBS)

	@echo "Generating name list: $(BIN).sym"
	$(CMD_ECHO) $(NM) -n $@ > $(BUILD_DIR)/$(BIN).sym

	@echo "Showing final size:"
	$(CMD_ECHO) ls -la $@

	@echo "Generating disassembly: $(BIN).disasm"
	$(CMD_ECHO) $(OBJDUMP) -S $@ > $(BUILD_DIR)/$(BIN).disasm

$(BUILD_DIR)/$(BIN).a: $(OBJS_ASM) $(OBJS_C)
	@echo "Building static library: $(notdir $@)"
	$(CMD_ECHO) $(AR) -r $@ $^

	@echo "Generating name list: $(BIN).sym"
	$(CMD_ECHO) $(NM) -n $@ > $(BUILD_DIR)/$(BIN).sym

	@echo "Showing final size:"
	$(CMD_ECHO) ls -la $@

	@echo "Generating disassembly: $(BIN).disasm"
	$(CMD_ECHO) $(OBJDUMP) -S $@ > $(BUILD_DIR)/$(BIN).disasm

clean:
	rm -f $(BUILD_DIR)/*.elf $(BUILD_DIR)/*.hex $(BUILD_DIR)/*.map
	rm -f $(BUILD_DIR)/*.o $(BUILD_DIR)/*.a $(BUILD_DIR)/*.sym $(BUILD_DIR)/*.disasm