The last search for a football coach was 72 days officially. According to every source I looked at, that was a record for longest search in college football history.
Throwing out a date....let's say November 28th (Clemson plays SC that day), that is 71 days.
SMU's last game is 12/5. Odds of hiring a coach before season concludes is virtually nil. Even if they announced that night, it is 78 days.
This will be the longest coaching search in college football history.