message: Hypre clarification
diff: @@ -18,8 +18,11 @@ requires an MPI C++ compiler, as well as the following external libraries:
  - METIS (a family of multilevel partitioning algorithms)
  http://glaros.dtc.umn.edu/gkhome/metis/metis/overview
  -The hypre dependency can be git cloned from the above LLNL repository which
  -contains the latest versions of hypre.
  +The hypre dependency can be downloaded as a tarball from GitHub or from the
  +project webpage https://www.llnl.gov/casc/hypre. For example, the 2.16.0 release
  +of hypre is available at
  +
  + https://github.com/hypre-space/hypre/archive/v2.16.0.tar.gz
  The METIS dependency can be disabled but that is not generally recommended, see
  the option MFEM_USE_METIS.
  @@ -386,7 +389,7 @@ directory and use the string @MFEM_DIR@, e.g. HYPRE_OPT = -I@MFEM_DIR@/../hypre.
  The specific libraries and their options are:
  - HYPRE, required for the parallel build, i.e. when MFEM_USE_MPI = YES.
  - URL: https://github.com/hypre-space/hypre
  + URL: https://github.com/hypre-space/hypre and https://www.llnl.gov/casc/hypre
  Options: HYPRE_OPT, HYPRE_LIB.
  - METIS, used when MFEM_USE_METIS = YES. If using METIS 5, set
  