On 27 Feb 2015, at 10:14 AM, Jeff Squyres (jsquyres) wrote: > Yes, you do need to specify -m32 in CFLAGS and --with-wrapper*, because you > may well want to build OMPI with one set of flags and build MPI applications > with a different set of flags. Hence, the wrappers don't contain all the > CFLAGS used to build OMPI, for example.
I think of -m32 and -m64 as really selecting different compilers. (Which might actually be true under the covers.) When I use the -m flag, I generally add it to the compiler definition (FF, FC, LD), not the XXFLAGS. If one follows that convention, will OpenMPI always pass the -m flag on to the wrapper scripts so the addition of --with-wrapper* is not necessary? It would have to handle the embedded blank properly, which may be tricky. Larry Baker US Geological Survey 650-329-5608 ba...@usgs.gov
