Conference call notes 20160111

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Notes on the EasyBuild conference call dedicated to discussing implementation of RPATH support, Monday January 11th 2016 (5pm CET)

Attendees

Alphabetical list of attendees (10):

• Xavier Besseron (Uni.lu, Luxembourg)
• Timothy Brown (Uni. of Colorado @ Boulder, US)
• Pablo Escobar (UniBas, Switzerland)
• Elisabeth Fisher (NASA, US)
• Todd Gamblin (LLNL, US)
• Fotis Georgatos (freelancer)
• Kenneth Hoste (HPC-UGent, Belgium)
• Lumír Jasiok (IIT4Innovations, Czech Republic)
• Alan O'Cais (JSC, Germany)
• Ward Poelmans (HPC-UGent, Belgium)

Agenda

• implementation of support for RPATH linking in EasyBuild
  • different available options?
  • overall approach for implementing option of choice
  • who does what?

Notes

Options

• compiler wrapper script (cfr. Spack)

  • https://github.com/LLNL/spack/tree/master/lib/spack/env
  • may be overkill for only RPATH

• ld wrapper script (cfr. Spack, script from Swedish colleagues)

  • should be sufficient (?)

• patchelf

  • doesn't work on OS X
  • 'dummy' values need to be included that are long enough to hold actual path

• $ORIGIN

  • can be used to support relative RPATH'ing
  • allows relocating installations later
  • advantage of Conda over Nix
  • not used in Spack today

• sanity check?

  • match ldd & readelf
  • Todd has something that works on Linux