config: revert removal of macro definitions still used in the code

m4/acx_options.m4

@@ -206,6 +206,14 @@ AS_IF([test "x$ENABLE_NC4SZLIB" = "xyes"],
       [AC_SEARCH_LIBS([nc_def_var_szip], [netcdf],
                [AC_DEFINE([HAVE_NC_DEF_VAR_SZIP],[1],[Define to 1 for NetCDF4 nc_def_var_szip support])],,)])
 
+AS_IF([test "x$ENABLE_NC4HDF5" = "xyes"],
+      [AC_SEARCH_LIBS([H5TS_mutex_lock], [netcdf],
+               [AC_DEFINE([HAVE_NC4HDF5_THREADSAFE],[1],[Define to 1 for NetCDF4/HDF5 threadsafe support])],,[-lhdf5])])
+
+AS_IF([test "x$ENABLE_NC4HDF5" = "xyes"],
+      [AC_SEARCH_LIBS([H5get_libversion], [netcdf],
+               [AC_DEFINE([HAVE_H5GET_LIBVERSION],[1],[Define to 1 for H5get_libversion support])],,[-lhdf5])])
+
 AC_SUBST([ENABLE_NETCDF])
 AC_SUBST([ENABLE_NC2])
 AC_SUBST([ENABLE_NC4])