c++ 64 bit compiler visual studio 2015 RC , msvc 14

Where I can get c++ 64 bit compiler for visual studio 2015, I believe it`s "msvc 14"? I know how to compile 64 bit application using 32 bit compiler, but my libraries are very big (> 2 GB) and I believe I need a 64 bit version of the compiler to process them. Important to note is that I need "msvc 14" (or newer) because of c++11 support upgrades.