I'm working on a project that use Jubatus core as a shared library.
Prior to 0.4.5, it was possible to disable regex library (re2) by compilation option.
Starting with 0.5.0 however requires regex library (oniguruma) even if we don't need the feature.
This is not an blocking issue but it's easy to handle if the regex library can easily be disabled.
Fixed via jubatus/jubatus_core#8