The HDF 4.2.8 release is now available. It can be obtained from the HDF Downloads page:
https://support.hdfgroup.org/downloads/index.html#hdf4
For the HDF 4.2.8 documentation, see:
https://support.hdfgroup.org/release4/doc.html
HDF 4.2.8 is a minor release with a few new features and changes, including the following:
Modifications were made in support of the HDF Mapping Project:
The function, GRgetpalinfo, was added to allow applications to get information about palettes.
Support was added to the library and hdp to detect IMCOMP compression.
A new function, GRgetcomptype, was added for returning an image's compression, including IMCOMP.
Support was added for Mac OS X 10.7.4 with GNU gcc and gfortran.
Please be sure to review the HDF 4.2.8 Release Notes for complete details on what has changed in this release:
https://support.hdfgroup.org/ftp/HDF/HDF_Current/src/hdf-4.2.8-RELEASE.txt