# -------------------------------------------------------------------------
# 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:
    - apple-clang
    - clang
    - gcc
    - intel
    providers:
      elf:
      - libelf
      unwind:
      - apple-libunwind
  apple-libunwind:
    buildable: false
    externals:
    # Apple bundles libunwind version 35.3 with macOS 10.9 and later,
    # although the version number used here isn't critical
    - spec: apple-libunwind@35.3
      prefix: /usr