Ray is implemented in C++ 1998 (ISO/IEC 14882:1998).

Ray compiles with:

	- GNU C++ (gcc/g++)
	- clang++/LLVM
	- Microsoft Visual Studio	(some constants must be defined, check the Makefile for -Dstuff)
	- Intel C++ (icpc)
	- pgi (The Portland Group)	(-Wall and -ansi must be removed from the Makefile)
	- pathscale