How do I specify different source file paths

[PiKa20]

hi, I refer to example/make_example and try to test my .c files

Firstly, I put all the source files in the SRC directory and set SRC_DIR in the makefile: export SRC_DIR ?= ../src. It compiles and runs correctly. My file structure is as follows.

../src/foo1.c
../src/foo1.h
../src/foo2.c
../src/foo2.h

But, when I put my source files in the different directory as below, and set SRC_DIR in the makefile:

export SRC_DIR ?= ../src
export SRC_DIR += ../foo

My file structure is as follows:

../src/foo1.c
../src/foo1.h
../foo/foo2.c
../foo/foo2.h

It tells me I can't find the relevant file:

My Makefile and MakefileTestSupport files as follows:

Makefile

CC = gcc
export BUILD_DIR ?= ./build
export SRC_DIR ?= ../src
export SRC_DIR += ../foo
export TEST_DIR ?= ./test
export TEST_BUILD_DIR ?= ${BUILD_DIR}/test
export CMOCK_DIR ?= ../../cmock
export UNITY_DIR ?= ../../cmock/vendor/unity

TEST_MAKEFILE = ${TEST_BUILD_DIR}/MakefileTestSupport
OBJ ?= ${BUILD_DIR}/obj
OBJ_DIR = ${OBJ}

default: all

all: setup test

setup:
    mkdir -p ${BUILD_DIR}
    mkdir -p ${OBJ}
    ruby ../../cmock/scripts/create_makefile.rb --silent

clean:
    rm -rf ${BUILD_DIR}

test: setup

-include ${TEST_MAKEFILE}

MakefileTestSupport

CC ?= gcc
BUILD_DIR = ./build
SRC_DIR = ../src ../foo
TEST_DIR = ./test
TEST_CFLAGS ?= -DTEST
CMOCK_DIR ?= E:/git/mt-x/cmock
UNITY_DIR ?= E:/git/mt-x/cmock/vendor/unity
TEST_BUILD_DIR ?= ${BUILD_DIR}/test
TEST_MAKEFILE = ${TEST_BUILD_DIR}/MakefileTestSupport
OBJ ?= ${BUILD_DIR}/obj
OBJ_DIR = ${OBJ}

./build/test/obj/unity.o: E:/git/mt-x/cmock/vendor/unity/src/unity.c
    ${CC} -o $@ -c $< -I E:/git/mt-x/cmock/vendor/unity/src

./build/test/obj/cmock.o: E:/git/mt-x/cmock/src/cmock.c
    ${CC} -o $@ -c $< -I E:/git/mt-x/cmock/vendor/unity/src -I E:/git/mt-x/cmock/src

./build/test/obj/foo1.o: ../src ../foo/foo1.c
    ${CC} -o $@ -c $< ${TEST_CFLAGS} -I ${SRC_DIR} ${INCLUDE_PATH}

./build/test/runners/runner_test_foo1.c: ./test/test_foo1.c
    @UNITY_DIR=${UNITY_DIR} ruby ${CMOCK_DIR}/scripts/create_runner.rb ./test/test_foo1.c ./build/test/runners/runner_test_foo1.c

./build/test/obj/runner_test_foo1.o: ./build/test/runners/runner_test_foo1.c
    ${CC} -o $@ -c $< ${TEST_CFLAGS} -I ../src ../foo -I ./build/test/mocks -I E:/git/mt-x/cmock/vendor/unity/src -I E:/git/mt-x/cmock/src ${INCLUDE_PATH}

./build/test/obj/test_foo1.o: ./test/test_foo1.c ./build/test/obj/foo1.o 
    ${CC} -o $@ -c $< ${TEST_CFLAGS} -I ../src ../foo -I E:/git/mt-x/cmock/vendor/unity/src -I E:/git/mt-x/cmock/src -I ./build/test/mocks ${INCLUDE_PATH}

./build/test/test_foo1: ./build/test/obj/test_foo1.o ./build/test/obj/runner_test_foo1.o ./build/test/obj/foo1.o   ./build/test/obj/unity.o ./build/test/obj/cmock.o
    ${CC} -o $@ ${LDFLAGS} ./build/test/obj/test_foo1.o ./build/test/obj/runner_test_foo1.o ./build/test/obj/foo1.o   ./build/test/obj/unity.o ./build/test/obj/cmock.o

./build/test/test_foo1.testresult: ./build/test/test_foo1
    -./build/test/test_foo1 > ./build/test/test_foo1.testresult 2>&1

./build/test/obj/foo2.o: ../src ../foo/foo2.c
    ${CC} -o $@ -c $< ${TEST_CFLAGS} -I ${SRC_DIR} ${INCLUDE_PATH}

./build/test/runners/runner_test_foo2.c: ./test/test_foo2.c
    @UNITY_DIR=${UNITY_DIR} ruby ${CMOCK_DIR}/scripts/create_runner.rb ./test/test_foo2.c ./build/test/runners/runner_test_foo2.c

./build/test/obj/runner_test_foo2.o: ./build/test/runners/runner_test_foo2.c
    ${CC} -o $@ -c $< ${TEST_CFLAGS} -I ../src ../foo -I ./build/test/mocks -I E:/git/mt-x/cmock/vendor/unity/src -I E:/git/mt-x/cmock/src ${INCLUDE_PATH}

./build/test/obj/test_foo2.o: ./test/test_foo2.c ./build/test/obj/foo2.o 
    ${CC} -o $@ -c $< ${TEST_CFLAGS} -I ../src ../foo -I E:/git/mt-x/cmock/vendor/unity/src -I E:/git/mt-x/cmock/src -I ./build/test/mocks ${INCLUDE_PATH}

./build/test/test_foo2: ./build/test/obj/test_foo2.o ./build/test/obj/runner_test_foo2.o ./build/test/obj/foo2.o   ./build/test/obj/unity.o ./build/test/obj/cmock.o
    ${CC} -o $@ ${LDFLAGS} ./build/test/obj/test_foo2.o ./build/test/obj/runner_test_foo2.o ./build/test/obj/foo2.o   ./build/test/obj/unity.o ./build/test/obj/cmock.o

./build/test/test_foo2.testresult: ./build/test/test_foo2
    -./build/test/test_foo2 > ./build/test/test_foo2.testresult 2>&1

test_summary:
    @UNITY_DIR=${UNITY_DIR} ruby ${CMOCK_DIR}/scripts/test_summary.rb --silent

.PHONY: test_summary

test: ./build/test/test_foo1.testresult ./build/test/test_foo2.testresult test_summary

I don't know if I can set SRC_DIR like this.