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From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2007-06-10 15:11:58


Just remove the -L and -l arguments -- OMPI's "mpif90" (and other
wrapper compilers) will do all that magic for you.

Many -L/-l arguments in MPI application Makefiles are throwbacks to
older versions of MPICH wrapper compilers that didn't always work
properly. Those days are long gone; most (all?) MPI wrapper
compilers do not need you to specify -L/-l these days.

On Jun 10, 2007, at 3:08 PM, Jeff Pummill wrote:

> Maybe the "dumb question" of the week, but here goes...
>
> I am trying to compile a piece of code (NPB) under OpenMPI and I am
> having a problem with specifying the right library. Possibly
> something I need to define in a LD_LIBRARY_PATH statement?
>
> Using Gnu mpich, the line looked like this...
>
> FMPI_LIB = -L/opt/mpich/gnu/lib/ -lmpich
>
> I tried to replace this with...
>
> FMPI_LIB = -L/usr/lib/openmpi/ -llibmpi
>
> to which the make responded...
> mpif90 -O -o ../bin/cg.A.2 cg.o ../common/print_results.o ../common/
> randdp.o ../common/timers.o -L/usr/lib/openmpi/ -llibmpi
> /usr/bin/ld: cannot find -llibmpi
> collect2: ld returned 1 exit status
>
> Wrong library file? Setup or path issue?
>
> --
> Jeff F. Pummill
> Senior Linux Cluster Administrator
> University of Arkansas
>
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-- 
Jeff Squyres
Cisco Systems