While compiling the apache2 module, I was seeing errors due to printf being undefined in the scope of FilterSupport.
This commit just includes stdio.h to ensure the printf is defined.
Fix build of LoggingAgent's FilterSupport.
Thanks for the report, I've fixed this.
At least 2 of our customers have had Passenger upgrades break because of this. Can you push a new gem?
We've seen a handful of customers now break Passenger when upgrading to 3.0.5 due to the build failing.
We'd really like to see a 22.214.171.124 rolled out with the build fixes ASAP if possible.