{ "gsl":
  { "type": "export"
  , "target": "gsl (unexported)"
  , "flexible_config": ["OS", "ARCH", "TARGET_ARCH", "TOOLCHAIN_CONFIG", "ENV"]
  }
, "gsl (unexported)":
  { "type": ["@", "rules", "CC", "library"]
  , "name": ["gsl"]
  , "hdrs": [["TREE", null, "."]]
  , "stage": ["gsl"]
  }
}