Spack: OpenMP w/o GPU (#3744)

Spack desktop environments:
Make sure that we are explicit about not matching GPU
packages if we want to build a pure OpenMP version on a
GPU-enabled machine.

Tools/machines/desktop/spack-macos-openmp.yaml

@@ -16,14 +16,14 @@ spack:
  specs:
  - adios2 ~fortran
  - ascent +adios2 +python ~fortran
- - blaspp
+ - blaspp ~cuda +openmp ~rocm
  - boost
  - ccache
  - cmake
  - conduit ~fortran
  - fftw
  - hdf5 ~fortran
- - lapackpp
+ - lapackpp ~cuda ~rocm ^blaspp ~cuda +openmp ~rocm
  - mpi
  - llvm-openmp
  - pkgconfig
@@ -57,7 +57,7 @@ spack:
 
  packages:
  all:
- variants: +mpi ~fortran
+ variants: +mpi ~fortran ~cuda ~rocm
  # BLAS/LAPACK: the default (accelerate) pulls [email protected] for
  # py-numpy, which fails to build on M1
  # MPI: the default (openmpi) triggers annoying firewall warnings when

Tools/machines/desktop/spack-ubuntu-openmp.yaml

@@ -15,14 +15,14 @@
 spack:
  specs:
  - adios2
- - blaspp
+ - blaspp ~cuda +openmp ~rocm
  - boost
  - ccache
  - cmake
  - ecp-data-vis-sdk +adios2 +ascent +hdf5 +sensei
  - fftw
  - hdf5
- - lapackpp
+ - lapackpp ~cuda ~rocm ^blaspp ~cuda +openmp ~rocm
  - mpi
  - pkgconfig
  - python
@@ -49,7 +49,7 @@ spack:
 
  packages:
  all:
- variants: +mpi ~fortran
+ variants: +mpi ~fortran ~cuda ~rocm
  # default blocks at HDF5 1.8, resulting in unmergable solution
  conduit:
  variants: ~hdf5_compat