[OMPI users] Question about "--appfile"

[Jianyu Liu]

Hi,
 
The man page said all other command line options will be ignored if --appfile 
used. 
 
So just wondering 
 
1.  how to specify  "--mca btl ^sm " option while launching MPMD applications 
with --appfile? 
 
2. how to know the option "--mca btl ^sm "  worked?
 
Appreciating your kindly help
 
Jianyu