There were some threads that dealt with that, but since Libraries 2.0 and IDE 2.0 which will bring some improvements and better compatibility are (over)due, there is not much point to invest extra effort into this “sinking ship” 
Porting from Arduino to Particle.io (Simplified-Hopefully)
[solved] Porting from Arduino to Particle
https://community.particle.io/t/tutorial-how-to-port-an-arduino-library-to-the-spark-core/3578 (hidden, but should have been published - never did tho’)
Library List + Porting How To
Support for Arduino #Include files
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