Including static libraries in shared libraries with libtool.

[Sam Varshavchik]

I'm trying to do the following with libtool, and it's not quite doing 
exactly what I want.  Can someone suggest the correct way to do the 
following, with libtool 1.5.6 and automake 1.8.3 on Linux:

I'm building several shared libraries.  These shared libraries use common 
code from several static libraries, which I'll refer to as component 
libraries.  Here's an example component library:

libauth_la_SOURCES=auth.h authexit.c chain.c checkpassword.c \
                  [ more sources go here ]
libauth_la_LDFLAGS=-static

libauth.la is not going to get installed by the final application.  It's an 
internal library whose only intended purpose is to provide some common code 
for a bunch of shared libraries that will be installed.

Here's one such shared library:

libauthuserdb_la_SOURCES=authuserdb.c preauthuserdb.c \
                       [ more sources ]
libauthuserdb_la_DEPENDENCIES=libauth.la
libauthuserdb_la_LIBADD=libauth.la
libauthuserdb_la_LDFLAGS=-module

My intentions here are:

Build the sources for libauthuserdb.la.  Take their object code, and grab 
whatever modules from libauth.la that are references by stuff in 
libauthuserdb.la, and place all of that into a shared library.

In other words:  look up all unresolved symbols from libauthuserdb.la's 
sources which can be found in the libauth.la.  Take whatever modules from 
libauth.la that libauthuserdb.la needs, and generate a .so containing 
libauthuserdb_la_SOURCES plus whatever the sources need that can be found in 
libauth.a

Unfortunately, the actual results are different.  There are two problem:

1. Libtool takes _all_ modules from libauth.la, and puts them into 
libauthuserdb.la.  I only want the modules that libauthuserdb.la actually 
needs.

2. For some reason, only the static version of libauthuserdb.la is 
generated.  I don't know why, but libauthuserdb.so is not created, only 
libauthuserdb.a is created.  I am _not_ using the --disable-shared flag with 
the configure script.

I'd like to come up with a solution to do what I want without 
rearchitecturing the source.  Of course, I could simply take the requisite 
libauth_la_SOURCES, manually add them to libauthuserdb_la_SOURCES, and build 
a garden-variety shared library, without a dependency on a static library.

However, this is not practical.  I'm building several shared libraries that 
use different bits and pieces of the common code, and manually tracking 
which common source module is used by which shared library is cumbersome. I 
need to coerce libtool in doing this job for me.

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