Edward Hartnett

Make sure that HAVE_H5Z_SZIP is undefined if szip is not present in HDF5.

Well this test is a holdover from the case of HDF5 having szip, but before filters were supported. In other words this test can run when HDF5 supports szip, even...

This is the same as the case with the default install directory which is /use/local. If you are not using sudo you must specify both prefix and plugin dirs. However...

Installing plugins there is necessary for zstandard compression to work out of the box. Installing them elsewhere would mean most users could not read zstandard compresses data but would get...

We did not forget this case, it is the very default case that we are primarily concerned about...

Alternatively use --with-plugin-dir to install the plugins wherever you want and have users set HDF5_PLUGIN_PATH to that directory.

Spack is great and I totally agree that it would be fantastic if **someone** helped keep it up to date. Can you help by showing us how to do it?

@gsjaardema what is involved in this? There is interest at NOAA for doing this, and of course there is also PIO which would benefit. Is this hard to do?

OK I know a lot more about spack now, and we are transitioning to spack at NOAA for all our HPC installations. It's a great package installation system and I...

To get 32 bit compiles, you can use the -m32 option to gcc.