Makefiles: How to add subdirectories in an application directory?

[kbumsik]

Hi, I am currently working on WINC1500 WiFi driver for MKR1000 and various boards (related: #6666)
I am trying to keep the code structure of the original WiFi driver in an application directory. So, my application directory looks like this:

app
  |-- main.c
  |-- boo1
  |     |-- boo1.c
  |     └-- boo1.h
  |-- boo2
  |     |-- boo2.c
  |     └-- boo2.h
  └-- boo3
        |-- boo3.c
        └-- boo3.h

and I added a following Makefile:

APPLICATION = test_winc1500
RIOTBASE ?= $(path-to-riot-root)

DIRS += boo1 boo2 boo3

BOARD ?= arduino-mkr1000

FEATURES_REQUIRED = periph_uart periph_spi periph_gpio 

USEMODULE += shell
USEMODULE += xtimer

include $(RIOTBASE)/Makefile.include

Lastly I added a simple include $(RIOTBASE)/Makefile.include Makefile in every boo directories.

When try compiling using make all it looks like each source is compiled but I got an error because they are not not linked together with the main program at the last stage. At least I got compiled boo*.o objects in bin/source directory.

So I have a couple of question here:

1. Did I miss something? What script I should add to compile it correctly?
2. Does it look OK so far? Especially, do I need to add that simple Makefile in every subdirectory?

Thank you in advance,
Bumsik.

[jnohlgard]

Try adding USEMODULE+=boo1 boo2 boo3 in your Makefile. I think there is room for improvement here, but IIRC that is what is needed to add the files from subdirectories to the linking stage.

[kbumsik]

Ohhh. It works! I now understood how MODULE is treated a little bit. Now I can communicate with the WiFi driver. Thanks a lot!

[smlng]

closing, issue resolved.

[mrusme]

For everyone else who's struggling with this and found this issue via Google: This doesn't seem to work anymore the way it's described in here. However, there's a working example inside the tests. 👍