spack/etc/spack/defaults/packages.yaml

# -------------------------------------------------------------------------
# This file controls default concretization preferences for Spack.
#
# Settings here are versioned with Spack and are intended to provide
# sensible defaults out of the box. Spack maintainers should edit this
# file to keep it current.
#
# Users can override these settings by editing the following files.
#
# Per-spack-instance settings (overrides defaults):
#   $SPACK_ROOT/etc/spack/packages.yaml
#
# Per-user settings (overrides default and site settings):
#   ~/.spack/packages.yaml
# -------------------------------------------------------------------------
packages:
  all:
    compiler: [gcc, intel, pgi, clang, xl, nag]
    providers:
      awk: [gawk]
      blas: [openblas]
      daal: [intel-daal]
      elf: [elfutils]
      gl: [mesa, opengl]
      glu: [mesa-glu, openglu]
      golang: [gcc]
      ipp: [intel-ipp]
      java: [jdk]
      lapack: [openblas]
      mkl: [intel-mkl]
      mpe: [mpe2]
      mpi: [openmpi, mpich]
      opencl: [pocl]
      openfoam: [openfoam-com, openfoam-org, foam-extend]
      pil: [py-pillow]
      pkgconfig: [pkgconf, pkg-config]
      scalapack: [netlib-scalapack]
      szip: [libszip, libaec]
      tbb: [intel-tbb]
      jpeg: [libjpeg-turbo, libjpeg]