HD5F Compatibility Macros (application: -DH5_USE_16_API -DH5Dopen_vers=1)

Hdf-forum archives
1

Shouldn’t:
ftn selectele.f90 -DH5_USE_16_API -DH5Dopen_vers=1
export HDF5_DEBUG=trace
seanb@mork:/lus/scratch/seanb> aprun ./a.out 2>&1 | grep Dopen
H5Dopen2(loc=16777216 (file), name=0xe70150, dapl=H5P_DEFAULT) = 83886080 (dset);
H5Dopen2(loc=16777217 (file), name=0xe70150, dapl=H5P_DEFAULT) = 83886081 (dset);
H5Dopen2(loc=16777216 (file), name=0xf76990, dapl=H5P_DEFAULT) = 83886080 (dset);
H5Dopen2(loc=16777217 (file), name=0xf76990, dapl=H5P_DEFAULT) = 83886081 (dset);

Force HDF5 to use “H5Dopen1” for HDF5 1.6.x compatibility ? Thanks.

Thanks for any help.
Sean

2

Hi Sean,

Fortran C wrappers use the latest versions of the C APIs and they are hardcoded, i.e, instead of H5Dopen we use H5Dopen2 call to open a dataset.
The flags you specified do not have any affect on the real function, but just on the macros like H5Dopen.

The HDF5 library versions 1.8.* have both functions H5Dopen1 and H5Dopen2 present unless —-disable-deprictated-symbols is specified when the HDF5 library is configured.
By default, H5Dopen will be H5Dopen2 unless the specified compiler flags are used or the library is configure with --with-default-api-version=v16. Please see http://www.hdfgroup.org/HDF5/doc/RM/APICompatMacros.html for more details.

Did you encounter any problem?

Thank you!

Elena

···

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

On Sep 8, 2014, at 1:10 PM, Sean Byland <seanb@cray.com<mailto:seanb@cray.com>> wrote:

Shouldn’t:
ftn selectele.f90 -DH5_USE_16_API -DH5Dopen_vers=1
export HDF5_DEBUG=trace
seanb@mork:/lus/scratch/seanb> aprun ./a.out 2>&1 | grep Dopen
H5Dopen2(loc=16777216 (file), name=0xe70150, dapl=H5P_DEFAULT) = 83886080 (dset);
H5Dopen2(loc=16777217 (file), name=0xe70150, dapl=H5P_DEFAULT) = 83886081 (dset);
H5Dopen2(loc=16777216 (file), name=0xf76990, dapl=H5P_DEFAULT) = 83886080 (dset);
H5Dopen2(loc=16777217 (file), name=0xf76990, dapl=H5P_DEFAULT) = 83886081 (dset);

Force HDF5 to use “H5Dopen1” for HDF5 1.6.x compatibility ? Thanks.

Thanks for any help.
Sean
_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org<mailto:Hdf-forum@lists.hdfgroup.org>
http://mail.lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5

3

Thanks for the info. I didn't encounter any problems but was attempting to help someone debug some hdf5 code.

Sean B.

···

________________________________
From: Hdf-forum [hdf-forum-bounces@lists.hdfgroup.org] on behalf of Elena Pourmal [epourmal@hdfgroup.org]
Sent: Monday, September 08, 2014 9:23 PM
To: HDF Users Discussion List
Cc: Marcus Wagner
Subject: Re: [Hdf-forum] HD5F Compatibility Macros (application: -DH5_USE_16_API -DH5Dopen_vers=1)

Hi Sean,

Fortran C wrappers use the latest versions of the C APIs and they are hardcoded, i.e, instead of H5Dopen we use H5Dopen2 call to open a dataset.
The flags you specified do not have any affect on the real function, but just on the macros like H5Dopen.

The HDF5 library versions 1.8.* have both functions H5Dopen1 and H5Dopen2 present unless —-disable-deprictated-symbols is specified when the HDF5 library is configured.
By default, H5Dopen will be H5Dopen2 unless the specified compiler flags are used or the library is configure with --with-default-api-version=v16. Please see http://www.hdfgroup.org/HDF5/doc/RM/APICompatMacros.html for more details.

Did you encounter any problem?

Thank you!

Elena

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

On Sep 8, 2014, at 1:10 PM, Sean Byland <seanb@cray.com<mailto:seanb@cray.com>> wrote:

Shouldn’t:
ftn selectele.f90 -DH5_USE_16_API -DH5Dopen_vers=1
export HDF5_DEBUG=trace
seanb@mork:/lus/scratch/seanb> aprun ./a.out 2>&1 | grep Dopen
H5Dopen2(loc=16777216 (file), name=0xe70150, dapl=H5P_DEFAULT) = 83886080 (dset);
H5Dopen2(loc=16777217 (file), name=0xe70150, dapl=H5P_DEFAULT) = 83886081 (dset);
H5Dopen2(loc=16777216 (file), name=0xf76990, dapl=H5P_DEFAULT) = 83886080 (dset);
H5Dopen2(loc=16777217 (file), name=0xf76990, dapl=H5P_DEFAULT) = 83886081 (dset);

Force HDF5 to use “H5Dopen1” for HDF5 1.6.x compatibility ? Thanks.

Thanks for any help.
Sean
_______________________________________________
Hdf-forum is for HDF software users discussion.
Hdf-forum@lists.hdfgroup.org<mailto:Hdf-forum@lists.hdfgroup.org>
http://mail.lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org
Twitter: https://twitter.com/hdf5