conditional compiling of subdirs

[Pascal Francq]

Hi,
I have a question concerning a project. I have a project directory 'r' in 
which there are several sub-directories, each sub-directory corresponds to a 
specific dynamic library.
I want to insert some options in the './configure' such as '--enable-rga' (or 
'--disable-rga') which then compile (or not) the corresponding sub-directory 
'rga'.
I suppose some magic in the Makefiles, but I don't know exactly how. Can 
someone give me a tip (or eventually a link to a source code where such a 
functionality is implemented easily).
Thanks.
-- 


Prof. Pascal Francq
Université Libre de Bruxelles
CAD/CAM Department
Avenue F.D. Roosevelt, 50
CP 165/14
B-1050 Brussels
BELGIUM
Tel. +32-2-650 47 65
Fax +32-2-650 47 24