Malcolm,
I remember Tim said that he had used the Intel compiler collection. He may
not have used the Fortran version, don't know. I have used the C Intel
compiler before; it is faster because it uses its own C libs, in particular,
the maths library which has been optimised for the Intel architecture. I did
not fined much difference in the speed of code when I was using C with
little or know function calls to the C libraries. I tried it a few years
ago, but gcc and the Intel compilers have both been improved.
Steve.
-----Original Message-----
From: Starlink development [mailto:[log in to unmask]] On Behalf Of
Malcolm J. Currie
Sent: 30 April 2004 13:41
To: [log in to unmask]
Subject: Q229: fortran compilers (fwd)
Can anyone help here please. It seems a valid Quick programming query
to me.
Malcolm
---------- Forwarded message ----------
Date: Thu, 29 Apr 2004 23:38:37 +0100 (BST)
From: Ian Howarth <[log in to unmask]>
To: [log in to unmask]
Subject: fortran compilers
Hi Malcolm,
I wasn't sure that this was eligible as an "official" enquiry so i've sent
it to your individual address. I've just installed the intel fortran [95]
(ifort) compiler since i've been told, anecdotally, that it generates very
fast linux i86 code. On trying it (on some f77 code!) i get various
errors which i suspect relate to the old g77 "no-second-underscore"
problem. There are some ifort options that look as though they're
relevant (-nus) but don;t match no-second-underscore exactly (and don;t
get rid of the error messages.
So, i guess my query is: do you have, or know who has, any experience
with this compiler, with a view to fixing up my makefile?
Cheers
i
==========================================================================
Ian Howarth, Professor of Astronomy
Dept. Physics & Astronomy, Tel: (0)20-7679-2000 (switchboard)
University College London, (0)20-7679-3491 (direct)
Gower Street, (0)20-7679-4373 (fax)
London WC1E 6BT, UK
Mail me in plain text ONLY - my spam filter rejects HTML mail, and I will
not
read unsolicited mail encoded with commercial software (i.e., MS-Word files)
|