Windows: Pull required declarations into roken.h.in

lib/roken/roken.h.in

@@ -125,6 +125,32 @@ typedef uint64_t           u_int64_t;
 #define UNREACHABLE(x) x
 #define UNUSED_ARGUMENT(x) ((void) x)
 
+#define RETSIGTYPE void
+
+#define VOID_RETSIGTYPE 1
+
+#ifdef VOID_RETSIGTYPE
+#define SIGRETURN(x) return
+#else
+#define SIGRETURN(x) return (RETSIGTYPE)(x)
+#endif
+
+#ifndef CPP_ONLY
+
+typedef int pid_t;
+
+typedef unsigned int gid_t;
+
+typedef unsigned int uid_t;
+
+typedef unsigned short mode_t;
+
+#endif
+
+#ifndef __cplusplus
+#define inline __inline
+#endif
+
 #else
 
 #define UNREACHABLE(x)