avoid needing to include hdf5 in public header files (bug #44370, #43180) * oct-hdf5-id.cc, oct-hdf5-id.h: New files. * libinterp/corefcn/module.mk: Update. * libgui/src/module.mk (src_libgui_src_la_CPPFLAGS): Remove $(HDF5_CPPFLAGS) from the list. * load-save.h (enum load_save_format_type): Always include LS_HDF5 in the list of values. * ls-hdf5.cc (read_hdf5_data, save_hdf5_data): Call check_hdf5_id_type. * oct-hdf5.h: Also #define HDF5_SAVE_TYPE. * ov.h, ov-base.h: Include oct-hdf5-id.h instead of oct-hdf5.h. Always declare load_hdf5 and save_hdf5 functions. * ov-base-int.cc, ov-base-int.h, ov-base.cc, ov-bool-mat.cc, ov-bool-mat.h, ov-bool-sparse.cc, ov-bool-sparse.h, ov-bool.cc, ov-bool.h, ov-cell.cc, ov-cell.h, ov-class.cc, ov-class.h, ov-complex.cc, ov-complex.h, ov-cx-mat.cc, ov-cx-mat.h, ov-cx-sparse.cc, ov-cx-sparse.h, ov-fcn-handle.cc, ov-fcn-handle.h, ov-fcn-inline.cc, ov-fcn-inline.h, ov-float.cc, ov-float.h, ov-flt-complex.cc, ov-flt-complex.h, ov-flt-cx-mat.cc, ov-flt-cx-mat.h, ov-flt-re-mat.cc, ov-flt-re-mat.h, ov-int16.cc, ov-int32.cc, ov-int64.cc, ov-int8.cc, ov-lazy-idx.h, ov-oncleanup.cc, ov-oncleanup.h, ov-range.cc ov-range.h, ov-re-mat.cc, ov-re-mat.h, ov-re-sparse.cc, ov-re-sparse.h, ov-scalar.cc, ov-scalar.h, ov-str-mat.cc, ov-str-mat.h, ov-struct.cc, ov-struct.h, ov-uint16.cc, ov-uint32.cc, ov-uint64.cc, ov-uint8.cc: Move #ifdef HAVE_HDF5 inside load_hdf5 and save_hdf5 functions. Always declare and define load_hdf5 and save_hdf5 functions.

--- a/libinterp/octave-value/ov-cx-mat.cc
+++ b/libinterp/octave-value/ov-cx-mat.cc
@@ -39,6 +39,7 @@
 #include "gripes.h"
 #include "mxarray.h"
 #include "oct-obj.h"
+#include "oct-hdf5.h"
 #include "oct-stream.h"
 #include "ops.h"
 #include "ov-base.h"
@@ -562,12 +563,12 @@
   return true;
 }
 
+bool
+octave_complex_matrix::save_hdf5 (octave_hdf5_id loc_id, const char *name,
+                                  bool save_as_floats)
+{
 #if defined (HAVE_HDF5)
 
-bool
-octave_complex_matrix::save_hdf5 (hid_t loc_id, const char *name,
-                                  bool save_as_floats)
-{
   dim_vector dv = dims ();
   int empty = save_hdf5_empty (loc_id, name, dv);
   if (empty)
@@ -651,13 +652,20 @@
   H5Sclose (space_hid);
 
   return retval;
+
+#else
+  gripe_save ("hdf5");
+  return false;
+#endif
 }
 
 bool
-octave_complex_matrix::load_hdf5 (hid_t loc_id, const char *name)
+octave_complex_matrix::load_hdf5 (octave_hdf5_id loc_id, const char *name)
 {
   bool retval = false;
 
+#if defined (HAVE_HDF5)
+
   dim_vector dv;
   int empty = load_hdf5_empty (loc_id, name, dv);
   if (empty > 0)
@@ -725,11 +733,13 @@
   H5Sclose (space_id);
   H5Dclose (data_hid);
 
+#else
+  gripe_load ("hdf5");
+#endif
+
   return retval;
 }
 
-#endif
-
 void
 octave_complex_matrix::print_raw (std::ostream& os,
                                   bool pr_as_read_syntax) const