[MITgcm-devel] ifort/icc compiler flags and optfile

[Patrick Heimbach]

Hi there,

I have a couple of questions regarding our default optfile
linux_amd64_ifort

1. how important is the flag "-ip" in CFLAGS (or, does it matter at all)?
Reason for asking is that some mpif wrappers use ifort for FC but gcc for CC (instead of icc).
Without the "-ip" flag in CFLAGS the optfile will work for both cases, but with this flag the compiling chokes.
Would we loose something if we just removed "-ip" in CFLAGS?
(the ifort man-pages claim that "-ip" improves runtime performance, but we hardly have any C code, so perhaps not relevant?).

2. looks like '-w95' and '-xW' are "deprecated (in ifort 12) and will be removed in a future release". Perhaps time to remove them from this default optfile (unless they're important for older ifort version?)

Cheers
p.

---
Patrick Heimbach | heimbach at mit.edu | http://www.mit.edu/~heimbach
MIT | EAPS 54-1420 | 77 Massachusetts Ave | Cambridge MA 02139 USA
FON +1-617-253-5259 | FAX +1-617-253-4464 | SKYPE patrick.heimbach

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