I'm converting to the use of libtool for my C++ libraries.
These libraries tend to have inter-library dependencies.  Libtool does not catch when my library has unresolved symbols due to a missing dependency (or any other reason).
In my previous build system, I used a "prelink stage" for checking for unresolved symbols and instantiating templates.
For g++, this is about as simple as replacing the '-shared' option with the following, as a pre-link before the real link:

-Wl,-defsym,main=0x0,-defsym,MAIN__=0x0

Since it's treated as an executable rather than a library, complete symbol checking and template instantiation occur.

I would like to see libtool provide a similar capability, even if only when g++ is used.  Without this, it is very difficult to determine missing dependencies in a library.

I am currently using libtool 1.5.2