gcc can be made to say:
attr_fn_tv.c:339:14: warning: duplicated 'if' condition [-Wduplicated-cond]
Source code is
if (attr->at_val.at_timeval.tv_usec < with->at_val.at_timeval.tv_usec)
{
return(-1);
}
else if (attr->at_val.at_timeval.tv_usec < with->at_val.at_timeval.tv_usec)
Clearly, the second "<" should be ">"