AS=nasm ASFLAGS += -f elf32 LDFLAGS += -m32 -nostdlib -static -fno-common -fno-use-cxa-atexit -fno-exceptions -fno-non-call-exceptions -fno-weak -fno-rtti -fno-stack-protector CFLAGS += -m32 -Wall -Wextra -Werror -ffreestanding -fno-exceptions -fno-pie -fno-stack-protector CXXFLAGS += -m32 -Wall -Wextra -Werror -ffreestanding -fno-exceptions -fno-rtti -fno-pie asmsrc=$(wildcard *.asm) asmobj=$(asmsrc:%.asm=%.o) csrc=$(wildcard *.c) cobj=$(csrc:%.c=%.o) kernel:$(asmobj) $(cobj) linker.ld $(CXX) $(LDFLAGS) $(cobj) $(asmobj) -o $@ -T linker.ld #https://gcc.gnu.org/onlinedocs/gcc/x86-Function-Attributes.html#x86-Function-Attributes exception_handler.o:exception_handler.c $(CC) $(CPPFLAGS) $(CFLAGS) -mgeneral-regs-only -c $< irq_handler.o:irq_handler.c $(CC) $(CPPFLAGS) $(CFLAGS) -mgeneral-regs-only -c $< %.o:%.asm $(AS) $(ASFLAGS) -o $@ $< test:kernel qemu-system-x86_64 -fda $< clean: $(RM) kernel $(asmobj) $(cobj)