How can my makefile make executable with source outside of its folder

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terminal

makefile

hi all
I have the following makefile

TARGET := test.so
DEFINES := 
CC := g++
CFLAGS := -Wall -O3 -c -fpic -I$(INCLUDES)
LDFLAGS := -lrt -ldl -lpthread -s -shared -fpic
SRCS := ./main.cpp \
../../src/test.cpp
INCLUDES =    -I../../inc

###########################
OBJS := $(patsubst %.cpp,%.o,$(SRCS))
all: $(TARGET)
$(TARGET): $(OBJS)
	$(CC) $(LDFLAGS) -o $@ $^
%.o: %.cpp
	$(CC) $(CFLAGS) $(DEFINES) $(INCLUDES) -c $<
clean:
	rm -rf $(TARGET) *.o ./.depend
depend: .depend
.depend: $(SRCS)
	rm -rf ./.depend
	$(CC) $(CFLAGS) $(DEFINES) -MM $^>>./.depend
include .depend
.PHONY: all clean

after running make I got the below error

g++: error: ../../src/test.o: No such file or directory

What I have tried:

it is right, My test.o file is built beside the main.o
when I ran the following command separately in terminal my .so was built successfuly

g++ -lrt -ldl -lpthread -s -shared -fpic -o test.so main.o test.o 

how can my makefile implement this behavior?