Is there a reason we wouldn't disable it in OMPI's hwloc by default? On Jun 8, 2011, at 5:14 PM, Josh Hursey wrote:
> In short, I haven't yet. I figured out the problem was in hwloc, and > started with the hwloc branch by itself. > > In Open MPI, we should be able to pass the --disable-gcc-builtin from > the main configure, right (since we pull in config/hwloc_internal.m4)? > So we would pass it similar to how we had to pass --disable-xml to > turn off that feature in the builtin hwloc (before it was turned off > by default). > > -- Josh > > On Wed, Jun 8, 2011 at 4:50 PM, Jeff Squyres <jsquy...@cisco.com> wrote: >> Josh -- >> >> How did you get this disabled from within OMPI? We don't invoke hwloc's >> configure via sub-shell; we directly invoke its m4, so we don't have an >> opportunity to pass --disable-gcc-builtin. Unless you passed that to the >> top-level OMPI configure script...? >> >> >> On Jun 8, 2011, at 4:28 PM, Josh Hursey wrote: >> >>> (This should have gone to the devel list) >>> >>> The attached patch adds a configure option (--disable-gcc-builtin) to >>> disable the use of GCC __builtin_ operations, even if the GCC compiler >>> supports them. The patch is a diff from the r3509 revision of the >>> hwloc trunk. >>> >>> I hit a problem when installing hwloc statically on a machine with a >>> slightly different gcc support libraries and OSs on the head/compile >>> node versus the compute nodes. The builtin functions would cause hwloc >>> to segfault when run on the compute nodes. By disabling the builtin >>> operations, and using the more portable techniques seemed to do the >>> trick. >>> >>> This problem first became apparent when using hwloc as part of Open >>> MPI. In Open MPI the mpirun process runs on the headnode, so the hwloc >>> install would work in the mpirun process but cause the compute >>> processes to segv. >>> >>> Can you review the patch, and apply it to the trunk? Once the patch is >>> in the trunk, then I'll work on the Open MPI folks to update their >>> revision. >>> >>> Thanks, >>> Josh >>> >>> -- >>> Joshua Hursey >>> Postdoctoral Research Associate >>> Oak Ridge National Laboratory >>> http://users.nccs.gov/~jjhursey >>> <hwloc-diff-r3509.diff>_______________________________________________ >>> hwloc-users mailing list >>> hwloc-us...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users >> >> >> -- >> Jeff Squyres >> jsquy...@cisco.com >> For corporate legal information go to: >> http://www.cisco.com/web/about/doing_business/legal/cri/ >> >> >> _______________________________________________ >> hwloc-users mailing list >> hwloc-us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users >> >> > > > > -- > Joshua Hursey > Postdoctoral Research Associate > Oak Ridge National Laboratory > http://users.nccs.gov/~jjhursey > > _______________________________________________ > hwloc-users mailing list > hwloc-us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
