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Re: [bgl-discuss] xlc/xlf versions of mpicc/mpif77 etc?


these are IBMs modified scripts. Bob gave them for free distribution at the apps workshop.

-katherine

On May 11, 2005, at 11:17 AM, Anthony Chan wrote:


Hi Katherine,

Since all the ~riley/bin/mp* compiler wrappers have IBM's copyright
statements, I wonder if the compiler wrappers are provided by IBM or you
modified from AIX's mp* scripts to be used in BG/L ?

A.Chan

On Wed, 11 May 2005, Katherine M Riley wrote:


And we also has a suite of mp* compile scripts in ~riley/bin.

-katherine

On May 11, 2005, at 10:14 AM, William Gropp wrote:

At 09:58 AM 5/11/2005, Andrew Siegel wrote: 
Agreed. We will make that wiki section(link info is there actually)
more
prominent, and one of us will write an mpicc/mpif77 etc script.

I can update the scripts (the MPICH2 scripts that IBM distributes have
all of the necessary features, or if they don't, we should update them
in MPICH2 and get IBM to distribute them). In fact, all that is
needed is to add some files to the etc directory (to enable the
environment variable/-conf argument method for switching between the
compilers) (other than fixing the -g -O2 in the current scripts). In
fact, additional configurations can be defined that enable recommended
optimization options with something like SETENV MPICH_F77 xlf-opt, as
long as there is an mpif77-xlf-opt.conf file in the etc directory.

Bill




-----Original Message-----
From: William Gropp [mailto:gropp@xxxxxxxxxxx]
Sent: Wednesday, May 11, 2005 9:54 AM
To: Andrew Siegel
Cc: discuss@xxxxxxxxxxxxxxx
Subject: RE: [bgl-discuss] xlc/xlf versions of mpicc/mpif77 etc?

At 09:38 AM 5/11/2005, Andrew Siegel wrote: 
I think we all just invoke the compilers directly and include/link
explicitly (would be nice to have a wrapper though). Did you want a
sample
makefile, or were you just curious if there was an alternative ... 

I'm surprised that invoking the compiler directly is acceptable; the
extra
link information is awkward to type and error-prone.  I'm trying to
understand why the mpicc/mpif77/etc. scripts are not used.  (It is
not easy
to find the correct info for compiling and linking files on BG/L;
there's
no obvious link on the BGL web pages, for example.)  For my codes, I
expect
the process to be

set

MPICC = path-to-mpicc
MPIF77 = path-to-mpif77

in my Makefile, followed by

make

followed by (in many cases a script that executes more than one job)

mpirun or mpiexec

followed by a step that gathers the results of the run.  Before the
update,
this was all that I needed to do to successfully use either the Gnu
or XL
compilers.  This seems simple to me, but if there is an easier way,
I'd
like to use it.  Surely you don't all remember that long link line
with the
various exports etc?  My memory isn't that good anymore :(

Bill



-----Original Message-----
From: owner-discuss@xxxxxxxxxxxxxxx
[mailto:owner-discuss@xxxxxxxxxxxxxxx] 
On Behalf Of William Gropp
Sent: Wednesday, May 11, 2005 9:31 AM
To: discuss@xxxxxxxxxxxxxxx
Subject: [bgl-discuss] xlc/xlf versions of mpicc/mpif77 etc?

I had set things up so that

setenv MPICH_F77 xlf
mpif77 ...

would get you the xlf version of mpif77 (with the correct libraries
and
options), and similarly for the C, F90, and C++ compilers. This also
worked
with mpif77 -conf=xlf ... . I find this particularly convenient
because it
makes it easy to use existing makefiles and switch between the
compilers. With the compiler upgrade, these have vanished. What do
people 
to to use the xl compilers now?

I also noted that the mpicc script sets the compiler flags -g -O2,
which it 
should not do (IBM needs to fix this in the distributions).

Bill

William Gropp
http://www.mcs.anl.gov/~gropp

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William Gropp
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William Gropp
http://www.mcs.anl.gov/~gropp
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------------------------------------------------------------------

Katherine M Riley
Argonne National Lab
Ph   : (630) 252-5786
Cell : (773) 351-6042

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Katherine M Riley
Argonne National Lab
Ph   : (630) 252-5786
Cell : (773) 351-6042

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