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Subject: [OMPI devel] 1.7.4rc: linux/ppc32/xlc-11.1 build failure
From: Paul Hargrove (phhargrove_at_[hidden])
Date: 2014-01-17 20:28:57

I am trying to build the 1.7 nightly tarball (1.7.4rc2r30303) on a
Linux/PPC system with the xlc-11.1 compilers configured for 32-bit output:

$ export OBJECT_MODE=32
$ [pathto]/configure CC=xlc CXX=xlC FC=xlf90 --enable-debug --prefix=...

The build fails with:

Making all in mpi/cxx
make[2]: Entering directory
  CXX mpicxx.lo
line 292.15: 1540-0274 (S) The name lookup for "opal_atomic_add_64" did not
find a declaration.
make[2]: *** [mpicxx.lo] Error 1

My guess is due to the ILP31 target, there might not *be* any atomic 64-bit
However, my Linux/ARM build with gcc worked fine, so clearly (to me) there
is support for ILP32 systems.

The OBJECT_MODE=64 case gets past this point (but fails building fortran
support - report coming soon).

I will accept "we don't support this target", but am reporting this for


Paul H. Hargrove                          PHHargrove_at_[hidden]
Future Technologies Group
Computer and Data Sciences Department     Tel: +1-510-495-2352
Lawrence Berkeley National Laboratory     Fax: +1-510-486-6900