Ian,

Would it be possible for your team to provide us with a simple example to 
reproduce the problem? This will help us to decide on the patch.

Thank you!

Elena
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Elena Pourmal  The HDF Group  http://hdfgroup.org
1800 So. Oak St., Suite 203, Champaign IL 61820
217.531.6112
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~




On May 23, 2015, at 4:01 PM, Ian Hinder 
<[email protected]<mailto:[email protected]>> wrote:

Hi,

We (Cactus developers) recently discovered that our code would not build with 
HDF5 1.8.15 due to a change to the way the __attribute__ preprocessor macro is 
handled by the HDF5 header files.

Previously (1.8.14), this attribute was undefined when C++ was used, but this 
only affected HDF5 source files, because the undefinition was in H5private.h.  
This was presumably fine, because the HDF5 source code could handle it.  In 
1.8.15, however, this code has moved into H5api_adpt.h, which is included by 
*users* of the HDF5 library.  This means that __attribute__ is broken in any 
source file that included it.  This attribute is important, because it controls 
things like vectorisation.  The error we get is listed below.

The relevant commit seems to be SVN revision 26678 
(https://github.com/live-clones/hdf5/commit/b283f087e32fb99023650240ef8290a3f46319c5).

I think it is important that this is fixed, possibly in a patch release, since 
it stops code from compiling.

(http://lists.einsteintoolkit.org/pipermail/users/2015-May/004168.html)

COMPILING arrangements/Carpet/CarpetIOHDF5/src/Output.cc<http://Output.cc>
In file included from 
/opt/local/lib/gcc49/gcc/x86_64-apple-darwin14/4.9.2/include/x86intrin.h:29:0,
               from 
/opt/local/include/gcc49/c++/x86_64-apple-darwin14/bits/opt_random.h:33,
               from /opt/local/include/gcc49/c++/random:50,
               from /opt/local/include/gcc49/c++/bits/stl_algo.h:66,
               from /opt/local/include/gcc49/c++/algorithm:62,
               from 
/Users/depietri/EinsteinToolkit/ET_dev/Cactus/arrangements/Carpet/CarpetLib/src/defs.hh:6,
               from 
/Users/depietri/EinsteinToolkit/ET_dev/Cactus/arrangements/Carpet/CarpetLib/src/bbox.hh:10,
               from 
/Users/depietri/EinsteinToolkit/ET_dev/Cactus/configs/sim/bindings/include/bbox.hh:4,
               from 
/Users/depietri/EinsteinToolkit/ET_dev/Cactus/arrangements/Carpet/Carpet/src/functions.hh:17,
               from 
/Users/depietri/EinsteinToolkit/ET_dev/Cactus/arrangements/Carpet/Carpet/src/carpet_public.hh:8,
               from 
/Users/depietri/EinsteinToolkit/ET_dev/Cactus/configs/sim/bindings/include/carpet.hh:4,
               from 
/Users/depietri/EinsteinToolkit/ET_dev/Cactus/arrangements/Carpet/CarpetIOHDF5/src/CarpetIOHDF5.hh:11,
               from 
/Users/depietri/EinsteinToolkit/ET_dev/Cactus/arrangements/Carpet/CarpetIOHDF5/src/Output.cc<http://Output.cc>:13:
/opt/local/lib/gcc49/gcc/x86_64-apple-darwin14/4.9.2/include/mmintrin.h: In 
function '__m64 _mm_cvtsi32_si64(int)':
/opt/local/lib/gcc49/gcc/x86_64-apple-darwin14/4.9.2/include/mmintrin.h:64:54: 
error: can't convert between vector values of different size
 return (__m64) __builtin_ia32_vec_init_v2si (__i, 0);
                                                    ^


--
Ian Hinder
http://members.aei.mpg.de/ianhin


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