On Jan 27, 2021, at 7:19 PM, Gilles Gouaillardet <gil...@rist.or.jp> wrote: > > What I meant is the default Linux behavior is to first lookup dependencies in > the rpath, and then fallback to LD_LIBRARY_PATH > *unless* -Wl,--enable-new-dtags was used at link time. > > In the case of Open MPI, -Wl,--enable-new-dtags is added to the MPI wrappers, > but Open MPI is *not* built with this option.
Oh, I see where I got confused: Open MPI (core and DSO components) is built with -rpath, but not --enable-new-dtags. Hmm. ...trying to remember why we would have made that choice... I don't see any obvious reason cited in the git history. Do you remember? > That means, that by default, mca_pml_ucx.so and friends will get libuc?.so > libraries at runtime from rpath > (and that cannot be overridden by LD_LIBRARY_PATH). Gotcha. -- Jeff Squyres jsquy...@cisco.com
