David - No problem. Generally, you can get away with that trick whenever you're compiling shared libraries and using the system compiler. The biggest advantage is that the chance of the code being mis-compiled goes down significantly when using the system compiler. The kernel is a good stress test that all the atomics got implemented properly :).
Brian On 3/20/12 1:24 PM, "Gunter, David O" <d...@lanl.gov> wrote: >You are right, Brian. I failed to build from a fresh untar, so I had some >leftover intel-compiled bits. > >Your suggestion seems to work so I'll pass it along to the user to try >out. > >Thanks! > >-david >-- >David Gunter >HPC-3: Infrastructure Team >Los Alamos National Laboratory > > > > >On Mar 20, 2012, at 9:52 AM, Barrett, Brian W wrote: > >> That doesn't make a whole lot of sense; what compile / link line is >> resulting in that error message? The error message is saying that >> libmpi.so depends on an Intel built-in function, but since you built >> libmpi.so with gcc, that shouldn't happen. Are you sure that libmpi.so >> wasn't build against the Intel compilers? >> >> Brian >> >> On 3/20/12 11:35 AM, "Gunter, David O" <d...@lanl.gov> wrote: >> >>> I wish it were that easy. When I go that route, I get error messages >>> like the following when trying to compile the parallel code with Intel: >>> >>> libmpi.so: undefined reference to `__intel_sse2_strcpy' >>> >>> and other messages for every single Intel-implemented standard >>>C-function. >>> >>> -david >>> -- >>> David Gunter >>> HPC-3: Infrastructure Team >>> Los Alamos National Laboratory >>> >>> >>> >>> >>> On Mar 20, 2012, at 8:18 AM, Barrett, Brian W wrote: >>> >>>> On 3/20/12 10:06 AM, "Gunter, David O" <d...@lanl.gov> wrote: >>>> >>>>> I need to build ompi-1.4.3 (or the newer 1.4.5) with an older Intel >>>>> 10.0 >>>>> compiler, but on a newer system in which the default g++ headers are >>>>> incompatible with Intel. Thus the C and Fortran compilers function >>>>> normally but the Intel C++ compiler fails to build even a simple >>>>>"hello >>>>> world" code. >>>>> >>>>> Is there a way to build OMPI without a C++ compiler? I tried using >>>>>the >>>>> --disable-mpi-cxx and --disable-mpi-cxx-seek flags but these are just >>>>> for >>>>> the resulting bindings. The configure step still continues to search >>>>> for >>>>> a working C++ compiler. >>>>> >>>>> Yes, I know I can upgrade the Intel compiler but we don't have that >>>>>as >>>>> an >>>>> option in this case. >>>> >>>> Unfortunately, you're a bit out of luck. Open MPI 1.4.x requires C++ >>>> even >>>> if you're not building the C++ bindings. This is not true of 1.5.x >>>>and >>>> later. >>>> >>>> If you don't need the C++ bindings, I would build Open MPI with GNU C >>>> and >>>> C++ and Intel Fortran. After building, edit >>>> <PREFIX>/share/openmpi/mpicc-wrapper-data.txt to change the >>>>compiler=gcc >>>> line to compiler=<intel C compiler>. There's not going to be much >>>> performance difference between the two compilers for Open MPI itself. >>>> GNU >>>> C and Intel C are link compatible, so that should work out for you and >>>> the >>>> users will never be the wiser. >>>> >>>> Brian >>>> >>>> -- >>>> Brian W. Barrett >>>> Dept. 1423: Scalable System Software >>>> Sandia National Laboratories >>>> >>>> >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> users mailing list >>>> us...@open-mpi.org >>>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>> >>> >>> _______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>> >>> >> >> >> -- >> Brian W. Barrett >> Dept. 1423: Scalable System Software >> Sandia National Laboratories >> >> >> >> >> >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users > > >_______________________________________________ >users mailing list >us...@open-mpi.org >http://www.open-mpi.org/mailman/listinfo.cgi/users > > -- Brian W. Barrett Dept. 1423: Scalable System Software Sandia National Laboratories
