tr1 osx 10.10.5 oF0.9 xcode 6.3.2

Hi

Im working on a project using oF 0.9 on OS X 10.10.5 and Xcode 6.3.2.

Works great, but im getting an error trying to use an addon with uses tr1 calls, so im getting this error when compiling

tr1/functional file not found

how can i get that to compile?