HDF5 metapackage (#146)

Author: perazz

.github/workflows/build.yaml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-11, windows-latest]
+        os: [ubuntu-latest, macos-12, windows-latest]
         gcc: [10]
 
     steps:

pages/spec/metapackages.md

@@ -102,3 +102,20 @@ Currently verified system configurations are:
 MPI C++ support on macOS is missing because homebrew is built with `clang`, whose C++ ABI is incompatible with the GNU C++ ABI needed to link against gfortran.
 :::
 
+## HDF5
+
+```{code-block} toml
+:emphasize-lines: 2
+name = "my_science_app"
+dependencies.hdf5 = "*"
+```
+
+HDF5 is supported for Fortran, C and C++ languages. The `pkg-config` backend is employed by `fpm` to find a valid local HDF5 installation, so, please insure that `pkg-config` is also available when using this metapackage. 
+
+Both the default and the high-level (`HL`) interfaces are linked against if available. 
+- On Ubuntu, special steps are taken to ensure `HL` are added. 
+- On Ubuntu with oneAPI compilers, `CMake` HDF5 installations are supported (`apt` versions only support `gfortran`).
+
+:::{note}
+Codes using HDF5 built with `oneAPI` compilers should not have the `-standard-semantics` flag: it changes module name mangling from `_mp_` to `_MP_` which makes HDF5 modules unavailable.
+:::