FreeBSD compiles to what POSIX or XPG?

[Göran Nilsson]

I have tried google, and tried bsdfourms. Now I'll put my hope to this list
instead.

Does FreeBSD compiles to the POSIX or X/Open Portability Guide XPG/1, /2,
/3, /4 standards?
I have found out that Aix,HP-UX,Solaris are three of them that compiles to
this standard.
So all systems that goes under "Unix" follow these standars.

I would be very interestead of a link to a document saying weither or not
FreeBSD
compiles to any of the above mentioned standards.

With regards

Goran