Makefile

TARGET := NSUE

# Directories
SRC_DIR := src
BUILD_DIR := build

SRC_DIRS := $(shell find $(SRC_DIR)/ -type d)
BUILD_SRC_DIRS := $(addprefix $(BUILD_DIR)/,$(SRC_DIRS))

# Tools
CROSS := mips-n64-

CC      := $(CROSS)gcc
AS      := $(CROSS)gcc
LD      := $(CROSS)ld
CPP     := $(CROSS)cpp
OBJCOPY := $(CROSS)objcopy
MKDIR   := mkdir -p
RMDIR   := rm -rf
CKSUM   := $(PYTHON) tools/n64cksum.py

# Inputs/outputs
ELF := $(BUILD_DIR)/$(TARGET).elf
Z64 := $(ELF:.elf=.z64)
ELF_IN := elf/NSUE.elf
Z64_IN := $(BUILD_DIR)/NSUE_in.z64
Z64_IN_OBJ := $(Z64_IN:.z64=.o)

C_SRCS := $(foreach dir,$(SRC_DIRS),$(wildcard $(dir)/*.c))
C_OBJS := $(addprefix $(BUILD_DIR)/, $(C_SRCS:.c=.o))
A_SRCS := $(foreach dir,$(SRC_DIRS),$(wildcard $(dir)/*.s))
A_OBJS := $(addprefix $(BUILD_DIR)/, $(A_SRCS:.s=.o))

OBJS := $(C_OBJS) $(A_OBJS) $(Z64_IN_OBJ)

# Flags
CFLAGS      := -c -mabi=32 -ffreestanding -mfix4300 -G 0 -fno-zero-initialized-in-bss -Wall -Wextra -Wpedantic
CPPFLAGS    := -Iinclude -I../rrow/include -I../rrow/include/2.0I -DF3DEX_GBI_2 -D_LANGUAGE_C
OPTFLAGS    := -Os
ASFLAGS     := -c -x assembler-with-cpp -mabi=32 -ffreestanding -mfix4300 -G 0 -O -Iinclude
LD_SCRIPT   := NSUE.ld
LDFLAGS     := -T $(BUILD_DIR)/$(LD_SCRIPT) -mips3 --accept-unknown-input-arch --no-check-sections
CPP_LDFLAGS := -P -Wno-trigraphs -DBUILD_DIR=$(BUILD_DIR) -Umips -DBASEROM=$(Z64_IN_OBJ)
BINOFLAGS   := -I binary -O elf32-big
Z64OFLAGS   := -O binary

# Rules
all: $(Z64)

$(BUILD_DIR) $(BUILD_SRC_DIRS) :
	$(MKDIR) $@

$(BUILD_DIR)/%.o : %.c | $(BUILD_SRC_DIRS)
	$(CC) $(CPPFLAGS) $(CFLAGS) $(OPTFLAGS) $< -o $@

$(BUILD_DIR)/%.o : %.s | $(BUILD_SRC_DIRS)
	$(AS) $(ASFLAGS) $< -o $@

$(BUILD_DIR)/$(LD_SCRIPT) :  $(LD_SCRIPT)
	$(CPP) $(CPP_LDFLAGS) $< -o $@

$(ELF) : $(OBJS) $(BUILD_DIR)/$(LD_SCRIPT) $(ELF_IN)
	$(LD) -R $(ELF_IN) $(LDFLAGS) -Map $(@:.elf=.map) -o $@
	
$(Z64_IN) : $(ELF_IN) | $(BUILD_DIR)
	$(OBJCOPY) $(Z64OFLAGS) $< $@

$(Z64_IN_OBJ) : $(Z64_IN) | $(BUILD_DIR)
	$(OBJCOPY) $(BINOFLAGS) $< $@
	
$(Z64) : $(ELF)
	$(OBJCOPY) $(Z64OFLAGS) $< $@
	$(CKSUM) $@

clean:
	$(RMDIR) $(BUILD_DIR)

.PHONY: all clean

print-% : ; $(info $* is a $(flavor $*) variable set to [$($*)]) @true