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Subject: [hwloc-devel] 1.3.2rc1 failures w/ icc on x86 (visibility?)
From: Paul H. Hargrove (PHHargrove_at_[hidden])
Date: 2012-02-10 12:27:44

I have versions 8.1.032, 9.0.024 and 9.1.042 of the Intel compilers on a
Linux/x86 (32-bit) host.
All three can configure and build hwloc-1.3.2rc1, but all are failing
"make check" in the same way.
What I see is ton(ne)s of linker messages and every executable SEGVs.

The linker messages look like:
> CC hwloc_synthetic.o
> CCLD hwloc_synthetic
> ld: hwloc_synthetic.o(.text+0x1c): unresolvable relocation against
> symbol `hwloc_topology_init'
> ld: hwloc_synthetic.o(.text+0x2a): unresolvable relocation against
> symbol `hwloc_topology_set_synthetic'
> ld: hwloc_synthetic.o(.text+0x33): unresolvable relocation against
> symbol `hwloc_topology_load'
> ld: hwloc_synthetic.o(.text+0x3c): unresolvable relocation against
> symbol `hwloc_topology_check'
> ld: hwloc_synthetic.o(.text+0x46): unresolvable relocation against
> symbol `hwloc_topology_get_depth'
> ld: hwloc_synthetic.o(.text+0x64): unresolvable relocation against
> symbol `hwloc_get_nbobjs_by_depth'
> ld: hwloc_synthetic.o(.text+0x8a): unresolvable relocation against
> symbol `hwloc_get_obj_by_depth'
> ld: hwloc_synthetic.o(.text+0xc6): unresolvable relocation against
> symbol `hwloc_topology_destroy'
Where most tests have far more of these.

For the moment, I am going to assume the SEGVs are a result of the
linker problems.

As compared to gcc on the same system, the only difference in
include/private/autogen/config.h is:
> /* Whether C compiler supports symbol visibility or not */
Where the '1' is the build with the Intel compiler.
So, my current suspicion falls on the visibility crud.
I can confirm that "HWLOC_CFLAGS = -fvisibility=hidden" in Makefile.
Other then that, I don't know where to begin looking at this problem.


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