I probably made things more difficult than they needed to be. For example apr and apr-util was already installed with Apache2 I think, I'm not sure. Anyway, finally success with the following configure
./configure --with-apr=/usr/bin/apr-config --with-apr-util=/usr/bin/apu-config --with-apxs="/usr/bin/apxs2" --disable-mod-activation --with-serf=/usr/local/serf svn --version now also shows * ra_serf : Module for accessing a repository via WebDAV protocol using serf. - handles 'http' scheme - handles 'https' scheme Cool! Onno
