The ABI incompatibility is bad when 

- Build glog without gflags (glog package in most distributions doesn't 
  depend on gflags) 
- Use both glog and gflags 


git-svn-id: https://google-glog.googlecode.com/svn/trunk@125 eb4d4688-79bd-11dd-afb4-1d65580434c0