cflag ffast-math

[Sérgio Basto]

Hi, 
Question about gcc cflag ffast-math .
Should I enable cflag ffast-math on opencv build explicitly 
( -DENABLE_FAST_MATH=ON ) ? and I keep disable cflag ffast-math in mlt
build [1] ?

Thanks,

[1]  
https://src.fedoraproject.org/rpms/mlt/blob/master/f/mlt.spec#_127
-- 
Sérgio M. B.