Did you search the lists archives? It's been reported and a fix is nominated for backport to 1.7.7 in the STATUS file.
Lev Serebryakov wrote on Fri, Sep 14, 2012 at 15:33:15 +0400: > Hello, Users. > > Now tools could not be built and installed without installed apache, > even if mod_dav_svn is disabled at configure stage. > > -- > // Black Lion AKA Lev Serebryakov <l...@freebsd.org> >