How to compile on windows?

```
[D:\Download\dev\wsServer-master] make
"  CC      src/ws.o"
src/ws.c:20:21: fatal error: pthread.h: No such file or directory
 #include <pthread.h>
                     ^
compilation terminated.
make: *** [src/ws.o] Error 1
```
Windows does not (and is unlikely to ever) support pthreads natively. So I wonder how this code can be compiled on windows?