Generate objects in right directory

[Sebastien REYNES]

Hello,

How to generate objects files in a dedicated directory ? When I launch the 
following Makefile.am in my current directory /home/devbdie/src/module1, the 
files *.o are generated in the same directory.

lib_LIBRARIES = libcomc.a
nodist_libcomc_a_SOURCES = prog1.c prog2.c prog3.c

Where can I specify a different target object directory ? 
(/home/devbdie/obj/module1 for instance)
Have I to set a parameter within the file configure.ac ? How can I do ?

Thank you in advance for your help

Sébastien