CODEWITHSUNDEEP
assemblymakefile
user3866044
user3866044

Reputation: 181

Can't figure out how to get makefile to work with just a .asm file and a .o file

FILES = lab.o

OBJS = $(FILES:.o=.c)
ASMS = $(FILES:.c=.s)

all:    lab

lab: $(OBJS)
    gcc -o lab $(OBJS)

asmfiles:   $(ASMS)

%.o:    %.c
    gcc -c $< -o $@

%.s:    %.c
    gcc -S $< -o $@

clean:
    rm -f *.o *.s

When running make clean, then make, I keep getting

make: *** No rule to make target `lab', needed by `all'.  Stop.

I've tried using both lab, lab.asm. lab.o for the files. I can't find much info on using a makefile without .c file.

Pretty stumped.

Upvotes: 1

Views: 2215

Answers (1)

Michael
Michael

Reputation: 58497

Your makefile doesn't specify what to do with .asm files, nor does it say anything about using NASM as the assembler.

Here's a small example makefile that would build an executable named lab from the assembly file lab.asm using NASM as the assembler and LD (from the GNU binutils) as the linker. Feel free to modify/expand it as necessary:

TARGET = lab
FILES = lab.asm

OBJS = $(FILES:.asm=.o)
NASM = nasm
ASM_FLAGS = -f elf64
LD = ld

all : $(TARGET)

lab: $(OBJS)
    $(LD) -o $(TARGET) $(OBJS)

%.o : %.asm
    $(NASM) $(ASM_FLAGS) -o $@ $<

Upvotes: 1

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