Optimizations

[Lorenzo Isella]

On Tue, 2005-05-03 at 09:56 -0700, Steve Kargl wrote:
> On Tue, May 03, 2005 at 06:53:20PM +0200, Lorenzo Isella wrote:
> > Hi,
> > I am interested in fortran90/95. 
> > So far I have always been using Microsoft visual studio, but I am now
> > getting into the open source world. I am toying around with the gfortran
> > and testing some old .f90 files of mine.
> > I am a bit puzzled as I did not find any optimization options (Did I
> > overlook something?).
> 
> Yes, you overlooked the fact that gfortran shares the gcc options.
> Thus, the gcc options -O1, -O2, and -Os and the machine options
> of -march=opteron are supported by gfortran.
> 
> > Second, I have never used the Lapack routines, but can they be used
> > without troubles/conflicts with the gfortran compiler?
> 
> Yes.
> 

Ok, thanks for the reply. How should I specify that I want to use e.g.
Lapack3? Should I also use a statement like 

external :: dsytri, dsytrf

in the main part of the code?

Many thanks

Lorenzo