CMake > 3.6.0 cannot configure with HDF5 libraries

[Jack Hale]

The latest CMake tries to find the HDF5 C++ and Fortran interfaces, even though they are not required by DOLFIN. HDF5 is correctly configured with the --enable-parallel flag, so the C++ and Fortran interfaces are not available. This results in the CMake configure process exiting before the compile.

[Jack Hale]

The same environment compiles perfectly on downgrading CMake to 3.5.1.

[Prof Garth Wells]

I have CMake 3.6.2, and it works fine for me.

[Johannes Ring]

I need to apply the following patch to make it work with CMake 3.6.2:

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7b1b11e..20341a3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -553,7 +553,7 @@ if (DOLFIN_ENABLE_HDF5)
     set(ENV{HDF5_ROOT} "$ENV{HDF5_DIR}")
   endif()
   set(HDF5_PREFER_PARALLEL TRUE)
-  find_package(HDF5)
+  find_package(HDF5 COMPONENTS C)
   set_package_properties(HDF5 PROPERTIES TYPE OPTIONAL
     DESCRIPTION "Hierarchical Data Format 5 (HDF5)"
     URL "https://www.hdfgroup.org/HDF5")

CMake 3.5.1 did not work for me either.

[Prof Garth Wells]

@johannes_ring Does the patch work with older version of CMake? If yes we could just apply it.

[Johannes Ring]

@garth-wells - yes, I tested it now with CMake 2.8.12 and it worked fine. I will apply it.

[Johannes Ring]

Fixed in 38b28c6.