[CMake] CMake Reports Incorrect HDF5 Libraries on OS X after 3.6.0 Upgrade

[Robert Maynard]

Hi Breannan,

I am able to reproduce this and will start digging into why this is occurring.

On Sun, Jul 10, 2016 at 6:34 PM, Breannan Smith <smithbreannan at gmail.com> wrote:
> After upgrading to CMake 3.6.0 from 3.5.2, CMake fails to find HDF5 on OS X.
>
> With 3.5.2, find_package(HDF5 REQUIRED COMPONENTS C) reports the
> following for HDF5_LIBRARIES. Note the presences of libhdf5.dylib, in
> this list:
>
> /usr/local/Cellar/hdf5/1.8.16_1/lib/libhdf5.dylib;/usr/local/opt/szip/lib/libsz.dylib;/usr/lib/libz.dylib;/usr/lib/libdl.dylib;/usr/lib/libm.dylib
>
> With 3.6.0, the same find_package command gives the following
> HDF5_LIBRARIES. Notice that libhdf5.dylib is not even present:
>
> /usr/local/lib/libsz.dylib;/usr/lib/libz.dylib;/usr/lib/libdl.dylib;/usr/lib/libm.dylib
>
> The contents of the HDF5_LIBRARIES and HDF5_C_LIBRARIES are the same
> under 3.6.0. Interestingly, the FindHDF5.cmake module does not report
> a failure under 3.6.0 even though it fails to locate the HDF5 library.
>
> I did not see any changes to FindHDF5.cmake listed under the 3.6
> release notes [1], but diffing the module files there were extensive
> edits made.
>
> Has anyone else run into this issue or found a fix? Thank you!
>
> [1] https://cmake.org/cmake/help/v3.6/release/3.6.html
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