#define WTERMSIG(s) ((s) & 0x7f)
#define WSTOPSIG(s) WEXITSTATUS(s)
#define WIFEXITED(s) (!WTERMSIG(s))
-#define WIFSTOPPED(s) ((short)((((s)&0xffff)*0x10001)>>8) > 0x7f00)
+#define WIFSTOPPED(s) ((short)((((s)&0xffff)*0x10001U)>>8) > 0x7f00)
#define WIFSIGNALED(s) (((s)&0xffff)-1U < 0xffu)
int posix_memalign (void **, size_t, size_t);