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

[Katherine M Riley <kmriley@xxxxxxxxxxxxxxxxxx>]

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
> > 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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