Sample makefile from .s -> bin

Makefile

AS := as
LD := ld

SRC := $(wildcard *.s)
OBJ := $(patsubst %.s, %.o, $(SRC))
BIN := $(patsubst %.o, %, $(OBJ))

.PHONY: all
all: $(BIN)

$(BIN): $(OBJ)
	@echo linking...
	$(LD) -o $@ $<

$(OBJ) : $(SRC)
	@echo assembling...
	$(AS) -o $@ $<


.PHONY: clean
clean:
	rm $(BIN) $(OBJ)