The error in the subject has been showing up on the Mac OS X buildslaves for the past few days (see http://ci.apache.org/builders/svn-x64-macosx-gnu-shared/builds/1388/steps/Build/logs/stdio), but nobody has done much about it.
However, this afternoon I ran autogen.sh and configure on my own trunk working copy (also on Mac OS X), and I now see the same problem. I don't know where my Apache is coming from, but APR is coming from MacPorts, which I suspect is a fairly common set up for people on Mac OS. The error I see is "Apache's APR version 1.3.8 doesn't match configure's 1.4.5". I've been running this configuration for many months without any problem. I know there has been some work in this area lately, and I'd be tempted to start reverting stuff under the "if a dev can't build, that's a problem" guideline, but I think we can probably fix this by moving forward, not backward. One possible solution is to just not build mod_dav_svn, rather than torpedoing the entire build, if Apache's APR doesn't match configure's. In any case, I think the current situation is not viable long term. -Hyrum
