[cfe-dev] clang on BGQ

[Michael Kruse]

Hello,

there is a backend for BG/Q CNKs available here:
http://lists.alcf.anl.gov/pipermail/llvm-bgq-discuss/2013-March/000131.html
(The .bin file is a .tar.gz)

It contains a wrapper script "bgclang" that will link against the CNK
CRT. To run on Juqueen, you will need to patch the clang driver to put
the directory /usr/lib64 after the cross-compile specific library
search paths. Otherwise it will try to link the frontend CRT. Also you
will need to edit hard-coded paths in a lot of places.

For also using MPI on the nodes, there are MPI compiler wrappers
available with the older patches at
http://trac.alcf.anl.gov/projects/llvm-bgq

It also generates QPX intrinsics, but in my experience so far, it's buggy.

I have clang running on Juqueen. If you are interested, it might be
easier to copy my files.

Good luck,
Michael Kruse


2013/4/17 Paolo Crosetto <p.crosetto at fz-juelich.de>:
> Dear developers,
>
> I recently compiled the git snapshot of clang on an IBM Blue Gene/Q
> supercomputer, however the compiler produces executables for the
> front-end node, while I should cross-compile to create executables for
> the compute nodes. I tried to gather some information googling how
> to set up a clang cross compiler but I couldn't figure it out. Does
> anyone have suggestions?
> Thanks!
>
> Paolo
>
>
> ------------------------------------------------------------------------------------------------
> ------------------------------------------------------------------------------------------------
> Forschungszentrum Juelich GmbH
> 52425 Juelich
> Sitz der Gesellschaft: Juelich
> Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498
> Vorsitzender des Aufsichtsrats: MinDir Dr. Karl Eugen Huthmacher
> Geschaeftsfuehrung: Prof. Dr. Achim Bachem (Vorsitzender),
> Karsten Beneke (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt,
> Prof. Dr. Sebastian M. Schmidt
> ------------------------------------------------------------------------------------------------
> ------------------------------------------------------------------------------------------------
>
> _______________________________________________
> cfe-dev mailing list
> cfe-dev at cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev