force write in Gfortran

[Tim Prince]

Paulo Ziemer wrote:
> Hi,
> 
> Is there any way to force Gfortran not buffer and write immediately  to 
> a file?  I have tried to use the environment GFORTRAN_UNBUFFRED_ALL but 
> it didn't work.
> Using ifort compiler the results are written much more faster than using 
> Gfortran. 
I'm guessing you aren't using 'ifort -assume buffered_io' which is often 
needed for good performance.  When you want to over-ride buffering, you 
have possibilities such as issuing a flush call (not standard Fortran).