Currently, to access official binaries for non-latest versions (which is needed, for example, for CI purposes, to test how using the older versions will affect the users), one needs to “log in to see the downloads”. The download link then has a temporary download in it.
What’s the reason behind hiding those binaries? It would be nice if there were stable official URLs with previously released binaries (this is most important for windows builds really, for other platforms users would typically install them using the respective package managers).
I could find some binaries here - https://support.hdfgroup.org/ftp/HDF5/prev-releases/ - but there’s only 1.8.21 and 1.10.0 with ‘bin’ folders for whatever reason, and all other versions only contain the source.