libtool 2.4.2-1.2ubuntu1 produces packages that don't work on OSX where upstream 2.4.2 does not

The following package was built using libtoolize from Ubuntu Raring's libtool package (2.4.2-1.2ubuntu1):

    http://capnproto.org/capnproto-c++-0.3.0-rc1.tar.gz

The package builds three libraries: libkj, libcapnp, and libcapnpc. libcapnpc depends on libcapnp which depends on libkj.

On Mac OSX, the link step for libcapnpc fails, claiming that symbols defined in libkj are undefined.

I installed GNU's libtool 2.4.2 source package and rebuilt the package, creating:

    http://capnproto.org/capnproto-c++-0.3.0-rc2.tar.gz

This version builds correctly on OSX.

Apparently, Ubuntu's version has a patch which changes the way dependencies are handled.

This may be in some part my fault. When I make this change to Makefile.am:

- libcapnpc_la_LIBADD = $(PTHREAD_LIBS) libcapnp.la
+ libcapnpc_la_LIBADD = $(PTHREAD_LIBS) libcapnp.la libkj.la

Then the problem goes away. I'm not sure if I was supposed to specify it that way, or if libtool is expected to link transitive dependencies automatically. However, it seems very suspicious that Ubuntu's version behaves differently from upstream in a way that breaks some uses.