prevent building static library

[Tommi Mäkitalo]

Hi,

when building libraries with LTLIBRARIES automake build static and dynamic 
versions of them. But I would like to build only the dynamic one. How can I 
tell automake not to build static libraries?

It is not only, that I don't need the static libraries, but building both 
doubles compiletime. And even worse: I just tried out ccache, which checks, 
if it has already build the file with the same flags. Building both versions 
with different flags discards always the cached version.

Tommi