Multi directory makefile for project

Question

This is how my directory looks like:

/project
    makefile
    /ceda_lib
        makefile
        files....
    /general
        makefile
        files....
    /CLI
        makefile
        files....
    /objects
         files.o

Makefile(main):

1  #start other makefiles
2  
3 
4  o= ./objects
5  DEPS= Affine.hpp CEDA.hpp generalParameters.hpp generalFunctions.hpp
6  OBJ= $o/main.o $o/Affine.o $o/generalFunctions.o
7  CC=g++
8  CFLAGS= -Wall -g -I.
9  export CC
10 export CFLAGS
11 export DEPS
12 
13 all: 
14 ▸---+$(MAKE) -C general
15 ▸---+$(MAKE) -C ceda_lib 
16 ▸---+$(MAKE) -C CLI
17 
18 run: $(OBJ) $(DEPS)
19 ▸---$(CC) -o $@ $^

The other makefiles look like this:(update2)

  1 include ../makefile.variables
  2 
  3 OBJ = main.o
  4 all: $(OBJ)
  5 
  6 $(OBJ): %.o: %.cpp $(DEPS)
  7 ▸---$(CC) -o ../objects/$@ -c $< $(CFLAGS)

What I want to do is for all code in the 3 directories to be compiled and all objects to be stored in the /object directory. Then an executable will be created from the $DEPS and the contents of /object directory.

This makefile doesn't work sadly. Could you please find what I've done wrong and also could you suggest me ways to improve the code. (I'm quite new to makefiles).

Also this is the output whenever I try making the project:(Update2)

make: Entering directory '/home/george/Documents/CEDA'
make -C general
make[1]: Entering directory '/home/george/Documents/CEDA/general'
g++ -o ../objects/generalFunctions.o -c generalFunctions.cpp -Wall -g -I.
make[1]: Leaving directory '/home/george/Documents/CEDA/general'
make -C ceda_lib
make[1]: Entering directory '/home/george/Documents/CEDA/ceda_lib'
g++ -o ../objects/Affine.o -c Affine.cpp -Wall -g -I.
Affine.cpp:4:33: fatal error: generalParameters.hpp: No such file or directory
 #include "generalParameters.hpp"
                                 ^
compilation terminated.
makefile:7: recipe for target 'Affine.o' failed
make[1]: *** [Affine.o] Error 1
make[1]: Leaving directory '/home/george/Documents/CEDA/ceda_lib'
makefile:8: recipe for target 'All' failed
make: *** [All] Error 2
make: Leaving directory '/home/george/Documents/CEDA'

This is the makefile.variables

  1 #variables used by all makefiles in project directory
  2 
  3 PATH_TO_DIR = ~/Documents/CEDA
  4 c = $(PATH_TO_DIR)/ceda_lib
  5 g = $(PATH_TO_DIR)/general
  6 e = $(PATH_TO_DIR)/CLI         #e for executable
  7 
  8 DEPS= $c/Affine.hpp $c/CEDA.hpp $g/generalParameters.hpp $g/generalFunctions.hpp
  9 CC=g++
 10 CFLAGS= -Wall -g -I.

Multi directory makefile for project

1 Answers