Zstandard support not compiled with CMake

[fjansson]

version: netcdf-fortran 4.6.2
OS: Arch Linux

I'm trying to get netcdf-fortran with zstandard compression working on Arch Linux. I already found that the Arch PKGBUILD script misses the HDF5_PLUGIN_PATH variable. A fix could be to add export HDF5_PLUGIN_PATH=nc-config --plugindir` in the Arch build script.

However, it seems the CMake build system never defines the preprocessor macro ENABLE_ZSTD, which is checked with an #ifdef in fortran/nf_nc4.F90

So, when I compile netcdf-fortran manually, using ./configure I can use zstandard, but when I compile it using cmake (via the PKGBUILD script), zstandard support is not available. I cannot find ENABLE_ZSTD anywhere in the CMake files, although there is a block of complicated zstandard-related logic.

[WardF]

Thank you, this is an oversight on our part, I will see what I can do, thanks!