So assuming that Intel 8.0 compilers are link compatible, that solves the problem with Intel compilers. What about other compilers though? Different versions of Intel compilers? What if 8.0 doesn't actually turn out to be link compatible? I'm really not that fussy or concerned about having built in support for non-gcc, but I'm just raising these questions so we don't assume that we've got the issue "solved".
I'm not in any rush to put up (and maintain) another version of mpich built for Intel up on OPD, but it will eventually happen. It actually shouldn't be too hard since I'm working from the same spec file. In the case of mpich, I'll probably have to make a separate version even then just for with MPD/without MPD, Intel/gcc, p4/gm/vmi, etc. That matrix alone would come out to 12 packages. :( But it should have a lot of overlapped effort.


Jeremy

At 08:20 AM 3/13/2003 -0500, Brian W. Barrett wrote:
On Thu, 13 Mar 2003, Jeff Squyres wrote:

> On Wed, 12 Mar 2003, Mattson, Timothy G wrote:
>
> > [snipped]
> > compilers will be in beta release soon.  Hence, at least for icc, there
> > may be no need to worry about separate mpi or PVM rpm's (note: this
> > assumes that there are not big performance advantages to using icc to
> > build pvm or mpi).
>
> I think that's the big issue -- performance.
>
> For example, there can be large performance differences between gcc 2.95
> and 3.2.  I'm assuming that icc, being a vendor-supported compiler, will
> have even better performance (although I have no empirical data to back
> that up).  This becomes critical for numerical libraries, not just MPI and
> PVM libraries.

Yeah, but as long as icc and gcc are link compatible (which is what Tim
says is going to happen), it doesn't matter.  The KAI team didn't make any
difference for LAM, so it's pretty doubtful that the Intel team will do
anything for LAM.  User apps, yes.  But if icc and gcc are
link-compatible, who cares?  Compile LAM with gcc ship it.  Let the user
compile his app with icc, and the world is good.

Brian

--
  Brian Barrett
  LAM/MPI developer and all around nice guy
  Have a LAM/MPI day: http://www.lam-mpi.org/


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