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

[Anthony Chan <chan@xxxxxxxxxxx>]

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
> >> >
> >> >-
> >> --------------------------------------------------------------------
> >> >To add or remove yourself from this mailing list, use the 'notifyme'
> >> >command on any BGL machine. To remove: notifyme -n, to add: notifyme
> >> -y.
> >>
> >> William Gropp
> >> http://www.mcs.anl.gov/~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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>

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