* CGNS: Allow use of git branch versions
Add ability to use git `master` and `develop` branches of the CGNS library. The `seacas` package sometimes needs to use the `master` or `develop` branch due to some new changes to the parallel I/O implementation in CGNS which has not yet been released.
* CGNS: Reorder to put newest version on top
Based on review comments, place newest version (develop) first in list.
* CGNS: Add option for 64-bit integers
Added the `int64` variant which will build the library using 64-bit integers for certain values. This gives the capability to have models with more than 2 billion cells and/or nodes.
Beginning with CGNS-3.1.0, two new typedef variables have been introduced to support 64-bit mode. The `cglong_t` typedef is always a 64-bit integer, and `cgsize_t` will be either a 32-bit or 64-bit integer depending on how the library was built. Many of the C functions in the MLL have been changed to to use `cgsize_t` instead of `int` in the arguments. These functions include any that may exceed the 2Gb limit of an` int`, e.g. zone dimensions, element data, boundary conditions, and connectivity. In Fortran, all integer data is taken to be `integer*4` for 32-bit and `integer*8` for 64-bit builds.
- remove the old LGPL license headers from all files in Spack
- add SPDX headers to all files
- core and most packages are (Apache-2.0 OR MIT)
- a very small number of remaining packages are LGPL-2.1-only
* Update CGNS to be able to be used in Trilinos.
* Updating Trilinos to be able to use CGNS.
* Fixing wrong cmake defines in trilinos for enabling cgns and cleaning up cgns package.
* Changing cgns parallel variant to mpi. Removing explicit dependence on parallel-netcdf in trilinos.
+ The recipe for cgns seems to be wrong. CMake complains about variables set but
not used (`HDF5_NEEDS_ZLIB`, `HDF5_NEEDS_MPI` and `HDF5_NEEDS_SZIP`) and fails
to find HDF5.
+ This change set removes these variables from the cmake configure line,
replacing them with `'-DHDF5_DIR=%s' % spec['hdf5'].prefix`
+ cgns also has trouble with parallel make, so I set `parallel = False`.
