Are there any Unix Compatible API libraries available for windows 7 x64?

I want to call on the header like
#include <sys/wait.h>

fork, getpid()
etc
I am wondering how I can substitute those calls under windows 7 x64.
I've a got a library which is called Festival which is part of an application library called Smartbody
and I can't compile it because there are some unix headers to call on...

http://smartbody.ict.usc.edu/download

I don't think cygwin is appropriate because it generates .a files, I need .lib files for my final product.
I need to build it under vs2013 community

Thanks
Jack