Fixed compatilibilty issues on MSVS.

winbuild/dist/include/unistd.h

@@ -1 +1,11 @@
 #pragma once
+
+// POSIX open,read,write... deprecated as of VC++ 2005.
+// Use ISO conformant _open,_read,_write instead.
+#define open _open
+#define write _write
+#define close _close
+#define read _read
+#define snprintf _snprintf
+#define dup _dup
+#define dup2 _dup2

winbuild/dist/include/winbuild.h

@@ -10,6 +10,7 @@
 #include <stdbool.h>
 #include <mmsystem.h>
 #include <io.h>
+#include <unistd.h>
 #include <process.h>
 #include <math.h>
 #include <time.h>