Any usage of LOG_EVERY_N fails to compile due to the compile assert used to check the severity parameter. This generates errors that look something like:
warning: unused typedef 'INVALID_REQUESTED_LOG_SEVERITY' [-Wunused-local-typedef].

This makes it impossible to use LOG_EVERY_N with this warning treated as an error.

You can see this occurring in the following links (although in those links it's just a warning):
https://stackoverflow.com/questions/37963886/errors-when-installing-caffe-on-mac-os-x-10-10-5
BVLC/caffe#3608

I have a fix for this issue.