sigmask
#define sigmask(m) (1 << ((m)-1))
#define sigmask(x) x
#define sigmask(m) (1 << ((m)-1))
#define sigmask(m) (1 << ((m)-1))
#define sigmask(m) (1 << ((m)-1))
#define sigmask(m) (m > 32 ? 0 : (1 << ((m)-1)))
#define sigmask(m) (m > 32 ? 0 : (1 << ((m)-1)))
# define sigmask(s) (1 << ((s) - 1))
# define sigmask(s) (1 << ((s) - 1))
# define sigmask(s) (1 << ((s) - 1))
#define sigmask(x) (1L<<(x)-1)
#define sigmask(m) (m > 32 ? 0 : (1 << ((m)-1)))
#define sigmask(n) ((unsigned int)1 << (((n) - 1) & (32 - 1)))