There already is a library ported for Particle
https://build.particle.io/libs/54e60eba88e2af9209001345
There are also some threads that deal with porting from Arduino to Particle
e.g
Porting from Arduino to Particle.io (Simplified-Hopefully)
http://community.spark.io/t/library-list-porting-how-to/8927
And there even is a github repo with some basic tips (including PGMSPACE)
https://github.com/harrisonhjones/Spark-Ported-Libraries
Although some info got obsolete already since some things have been incorporated in the framework already
e.g.
pgmspace.h: No such file or directory can easily be cured with
#ifdef __AVR__
#include <avr/pgmspace.h>
#else
/* this block is not required anymore
* #define pgm_read_byte(addr) (*(const unsigned char *)(addr))
* #define pgm_read_byte_near(addr) (*(const unsigned char *)(addr))
* #define pgm_read_word(addr) (*(const unsigned short *)(addr))
* #define pgm_read_word_near(addr) (*(const unsigned short *)(addr))
*/
#endif
Same for the F() macro - it’s already there.