The automake/libtool way to make a dynamic lib from multiple sources

[Ryan McDougall]

Hello,
 I apologize if this has been answered somewhere. Ive read the book and
searched the archives.

 My situation is this: 

Im porting a large code-base from windows to linux, and attempting to
use autotools to do so. The code in SVN is essentially one big tree of
somewhat related modules -- lets call them foo, bar, etc (Projects under
MS VS). I need to produce 3 dynamic libraries that can be built from
those modules -- lets call them A.so, B.so, and C.so (Solutions under
VS). They depend on a non-overlapping, non-disjoint set of the source
code modules in the directory. Directories for A, B, and C also
contain .cpp files and appear in the same parent directory as foo, bar,
etc.

Currently I have all directories building respective "foo.la"s --
including A.la, B.la, and C.la, and have them installing correctly.

Problems: 
- I dont need the foo,bar,etc constituent libraries, I just need A,B,C
libraries, which means I have to manually delete them from the install
location afterwords
- I would like to be able to type "Make A" from the parent directory,
and have the build system figure out which among foo,bar,etc libraries
are needed by A and build them in the manner you would expect
- I would like to accomplish this with a minimum of messing with the
file hierarchy. Since Visual Studio can manage this feat, Im hoping its
not above autotools!

What do you recommend great wizards of autotoolry?

Cheers,