* gnu/packages/maths.scm (hdf4)[arguments]: Rename custom phase 'add-more-aarch64-support to 'add-more-architecture-support and add support for riscv64-linux. * gnu/packages/patches/hdf4-architectures.patch: Refresh from upstream.
* gnu/packages/patches/hdf4-architectures.patch: New file. * gnu/local.mk (dist_patch_DATA): Register patch. * gnu/packages/maths.scm (hdf4)[source]: Add patch.