sci@gentoo.org Gentoo Science Project HDF5 is a file format and library for storing scientific data. HDF5 was designed and implemented to address the deficiencies of HDF4.x. It has a more powerful and flexible data model, supports files larger than 2 GB, and supports parallel I/O. Enable high level API (https://support.hdfgroup.org/HDF5/doc/HL/index.html) Enable support for read-only S3 access (https://portal.hdfgroup.org/display/HDF5/Configuration+and+Setup+for+HDF5+Read+Only+S3+VFD) Enable unsupported combinations of configuration options HDFGroup/hdf5