Multiple-dir make.

[Andrea Riciputi]

Hi all,
I have a project here that I want to compile using make. The code of 
the project can be organized hierarchically as a common set of source 
files (named foo), and many different (and indipendent) sets of source 
files (named bar01, bar02, and so on) all linking against the object 
files resulting from the foo source files.

-----/foo (the common set of source file)
  |
  |--/bar01 (first set of source file that link against foo)
  |
  |--/bar02 (second set of source file that link against foo)
  |
....

When I run make inside one of the bar directories, I'd like that the 
files inside foo were rebuild (if necessary) and then the file inside 
bar were compiled and linked together with those in foo. I means 
something like this:

gcc ../foo/foofileA.o ../foo/foofileB.o bar01fileA.o bar01fileB.o -o 
bar01module.so

I've tried to get it with make, but without success, neither googling 
the Net helped. Is it possible to get this behavior with make? How?

Thanks in advance,
 Andrea.