diff options
Diffstat (limited to 'makefile')
| -rw-r--r-- | makefile | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/makefile b/makefile new file mode 100644 index 0000000..62acb87 --- /dev/null +++ b/makefile @@ -0,0 +1,43 @@ +# MIT License, Copyright (c) 2021 Marvin Borner + +# Obviously needs cross compiler +CC = $(PWD)/cross/opt/bin/i686-elf-gcc +LD = $(PWD)/cross/opt/bin/i686-elf-ld +OC = $(PWD)/cross/opt/bin/i686-elf-objcopy +ST = $(PWD)/cross/opt/bin/i686-elf-strip +AS = nasm + +BLD = $(PWD)/build/ +SRC = $(PWD)/src/ + +SRCS = $(wildcard $(SRC)/loader/*.c) +OBJS = $(patsubst $(SRC)/%.c,$(BLD)/%.o,$(SRCS)) + +# Enable many warnings for less bugs :) +WARNINGS = -Wall -Wextra -Wshadow -Wpointer-arith -Wwrite-strings -Wredundant-decls -Wnested-externs -Wformat=2 -Wmissing-declarations -Wstrict-prototypes -Wmissing-prototypes -Wcast-qual -Wswitch-default -Wswitch-enum -Wunreachable-code -Wundef -Wold-style-definition -Wvla -pedantic-errors + +# Disable some GCC features and boilerplate generation +CFLAGS = $(WARNINGS) -std=c99 -m32 -nostdlib -nostdinc -ffunction-sections -fno-builtin -fno-profile-generate -fno-omit-frame-pointer -fno-common -fno-asynchronous-unwind-tables -fno-stack-protector -fno-pie -mno-red-zone -mno-mmx -mno-sse -mno-sse2 -Ofast -ffreestanding -Wl,-estart -I$(SRC)/loader/inc/ + +ASFLAGS = -f elf32 + +all: dir $(BLD)/boot.bin + +dir: + @mkdir -p $(BLD)/entry/ + @mkdir -p $(BLD)/loader/ + +$(BLD)/boot.bin: $(BLD)/loader.bin + @$(AS) -f bin $(SRC)/entry/bootsector.asm -o $@ + +$(BLD)/loader.o: $(OBJS) + @$(LD) -N -z max-page-size=0x1000 -estart -T$(SRC)/loader/link.ld -o $@ $^ + +$(BLD)/loader.bin: $(BLD)/loader.o + @$(OC) -O binary $^ $@ + +$(OBJS): $(BLD)/%.o : $(SRC)/%.c + @$(CC) -c $(CFLAGS) $< -o $@ + +clean: + @rm -rf $(BLD)/* |