[bug #68251] Load-Save support for MAT-file v7.3 (HDF5-based format)

foreverallama <[email protected]> Fri, 24 Apr 2026 07:16:47 -0400 (EDT)

Newsgroups	gmane.comp.gnu.octave.bugs
Message-ID	<[email protected]>

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Follow-up Comment #6, bug #68251 (group octave):

Regarding API compatibility, right now compatibility macros in Octave are
version based. However, HDF5 docs mention that API compatibility behaviour can
be set by the user during build. For example, "H5Gopen()" could be built such
that it maps to "H5Gopen1()", which would break things in Octave as it would
expect "H5Gopen2" instead based on macro "HAVE_HDF5_18".

We could move to a feature-based flag. Something like
"AC_CHECK_FUNCS([H5Gopen2])" in configure, and then we could define wrappers
like:

inline hid_t octave_H5Gopen(hid_t loc, const char *name)
{
#if defined(HAVE_HDF5_H5GOPEN2)
  return H5Gopen2(loc, name, H5P_DEFAULT);
#else
  return H5Gopen(loc, name);
#endif
}




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