I emerged net-www/apache-2.0.49-r3 first. Then emerged subversion and it complained that it was blocked on apache. Looking at the ebuild, it appears that 'apache2' should allow the build. Reproducible: Always Steps to Reproduce: 1. emerge apache 2. emerge subversion 3. Actual Results: emerge fails complaining about being blocked on apache. Expected Results: successful emerge.
This is right, if you have apache 2 installed you must use the apache2 useflag for subversion. (If you don't want it in general use /etc/portage/package.use). The cause is in the fact that subversion uses the apache portability libraries that ship both with subversion and apache2. It is however only possible/sensible to install one version.