Build error with parallel 2.0.0

[jrydh]

Thank you for the earlier correction. Another error has turned up when parallel HDF5 is enabled:

error[E0425]: cannot find value `H5FD_MPIO_id` in module `hdf5_sys::h5p`
   --> [...]\hdf5-metno-0.12.1\src\globals.rs:364:74
    |
364 | pub static H5FD_MPIO: LazyLock<hid_t> = LazyLock::new(|| *hdf5_sys::h5p::H5FD_MPIO_id);
    |                                                                          ^^^^^^^^^^^^ not found in `hdf5_sys::h5p`

Perhaps this is meant to be h5fd::H5FD_MPIO? Although if so, it seems there is a type mismatch on Windows (usize vs i64) due to this "dllimport hack".

I suppose you don't have this configuration in CI, but I can test using a pre-release branch if you like, so that you don't have to make repeated new releases.

[mulimoen]

I made issue #142 for it, it is a finicky job to set up so I would welcome any help on it

[mulimoen]

I pushed some more changes to #141 which may have fixed the above issue, would greatly appreciate some testing if it works as expected

[jrydh]

The static is called h5fd::H5FD_MPIO and not h5fd::H5FD_MPIO_id. However, note that it is a usize (on Windows non-static) whereas a hid_t (i64) is expected. I verify that if I fix the name and additionally redefine globals_2_0_0::id_t in h5fd.rs:495 to crate::h5i::hid_t (like in the other case), there are no more compilation errors. But I suspect it was defined that way for a reason, probably relating to this "dllimport hack" that a comment mentions, though this is mysterious to me.

At least a simple example creating an HDF5 file with the mpio driver seems to work with the change, but I haven't been able to actually write a dataset in parallel yet. It is unrelated to this issue, but I can't find any API corresponding to H5Pset_dxpl_mpio, and no way to pass the plist when reading or writing a dataset – I think possibly this is missing today. I could perhaps lend hand if so, when I understand the codebase a bit better.

Edit: all hdf5 tests also passed for me with these changes on my setup.