1: pthread_attr_setguardsize
    2: 
    3:   test effectiveness
    4: 
    5: pthread_attr_[sg]etschedparam
    6: 
    7:   what to test?
    8: 
    9: pthread_attr_[sg]etstack
   10: 
   11:   some more tests needed
   12: 
   13: pthread_getcpuclockid
   14: 
   15:   check that value is reset -> rt subdir
   16: 
   17: pthread_getschedparam
   18: pthread_setschedparam
   19: 
   20:   what to test?