Make file for project witch structure -main.c /module1/*c /module2/*c

Makefile

CC = gcc
FLAGS = -g

SRC_DIR   := module1 module2 .
INCLUDE   := $(addprefix -I, $(SRC_DIR))

SRC       := $(foreach sdir,$(SRC_DIR),$(wildcard $(sdir)/*.c))
OBJ       := $(patsubst %.c, build/%.o,$(SRC))

PROG      := build/test.out

vpath %.c $(SRC_DIR)

all:$(PROG)

$(PROG):$(OBJ)
	$(CC) $(FLAGS) $(OBJ) -o $(PROG)

build/%o:%c
	@mkdir -p $(dir $@)
	$(CC) $(FLAGS) -c $< -o $@

clean:
	rm -rf build
test:
	@echo $(OBJ)
	@echo $(SRC)
	@echo $(SRC_DIR)
	@echo $(INCLUDE)
	@echo $(SRC)
	@echo $(OBJ)

Makefile-all.mk

CC = gcc
FLAGS = -g

PROJECT = test_makefile
MODULE 	= module1 module2
BUILD  	= ./build
SRC    	= $(wildcard *.c) $(wildcard module1/*.c) $(wildcard module2/*.c)
OBJ    	= $(patsubst %.c, $(BUILD)/%.o, $(SRC))
OUT	= $(BUILD)/$(PROJECT).out

all : make_recursive

make_recursive: build_folder $(MODULE) $(OBJ)
	$(CC) $(FLAGS) $(OBJ) -o $(OUT)

build_folder:
	mkdir -p $(BUILD) $(addprefix $(BUILD)/, $(MODULE))

$(MODULE):
	@$(MAKE) -C $@

$(BUILD)/%.o:%.c
	mkdir -p $(BUILD)
	$(CC) $(FLAGS) -c $< -o $@

clean:
	rm -rf build

.PHONY: all clean build_folder $(MODULE)

Makefile-sub.mk

CC = gcc
FLAGS = -g

MODULE  = module1
OUT	= ../build/$(MODULE)
SRC 	= $(wildcard *.c)
OBJ	= $(patsubst %.c, $(OUT)/%.o, $(SRC))

.PHONY: module

module:$(OBJ)

$(OUT)/%.o : %.c
	$(CC) $(FLAGS) -c $^ -o $@