use HDF5 2.2 by default

Author: scivision

README.md

@@ -33,7 +33,10 @@ h5fortran is designed for easy use using static or shared linking from your proj
 * CMake + Git submodule
 * Fortran Package Manager (fpm)
 
-If using CMake, h5fortran will automatically build the HDF5 library (and Zlib if HDF5 2.x) from source if a compiler-compatible HDF5 is not found on the system.
+If using CMake, h5fortran will automatically build the HDF5 library and Zlib from source if a compiler-compatible HDF5 is not found on the system.
+The default version of HDF5 built if needed is 2.2.
+h5fortran needs at least HDF5 1.10.
+
 HDF5 auto-build options include:
 
 * To disable the auto-build of HDF5 use `cmake --preset no-build-hdf5`

cmake/hdf5.cmake

@@ -9,7 +9,7 @@ include(CheckSourceCompiles)
 
 
 if(NOT DEFINED h5fortran_hdf5_req)
-  set(h5fortran_hdf5_req "2.1patch")
+  set(h5fortran_hdf5_req "2.2")
 endif()
 # HDF5 2.x requires CMake >= 3.26, but the benefits are so great that this is worthwhile
 

cmake/libraries.json

@@ -5,6 +5,7 @@
     "2.0": "https://github.com/HDFGroup/hdf5/archive/refs/tags/2.0.0.tar.gz",
     "2.1": "https://github.com/HDFGroup/hdf5/archive/refs/tags/2.1.1.tar.gz",
     "2.1patch": "https://github.com/HDFGroup/hdf5/archive/353da6cce4228f0520585dc12b9b77ed7032d59d.tar.gz",
-    "$comment": "vital commit for dev is 7f79a4e3c79b6ea2b6a5dee81e9f624cceb51bdd on March 18, 2026, which isn't in tag 2.1.1. 64036c6d03d77ec84959ec0257732e3efb6d3571 is another good commit that works for Windows oneAPI for example."
+    "$comment": "vital commit for dev is 7f79a4e3c79b6ea2b6a5dee81e9f624cceb51bdd on March 18, 2026, which isn't in tag 2.1.1. 64036c6d03d77ec84959ec0257732e3efb6d3571 is another good commit that works for Windows oneAPI",
+    "2.2": "https://github.com/HDFGroup/hdf5/archive/refs/tags/2.2.0.tar.gz"
   }
 }