hpcx-mpi: new package (#24194)

This is a virtual package for Nvidia's HPC-X MPI implementation for
external specs only.

var/spack/repos/builtin/packages/hpcx-mpi/package.py

@@ -0,0 +1,43 @@
+# Copyright 2013-2021 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+import os
+
+
+class HpcxMpi(Package):
+    """The HPC-X MPI implementation from NVIDIA/Mellanox based on OpenMPI.
+    This package is for external specs only."""
+
+    homepage = "https://developer.nvidia.com/networking/hpc-x"
+    maintainers = ['mwkrentel']
+
+    has_code = False
+
+    provides('mpi')
+
+    def install(self, spec, prefix):
+        raise InstallError('HPC-X MPI is not buildable, it is for external '
+                           'specs only.')
+
+    def setup_dependent_package(self, module, dependent_spec):
+        # This works for AOCC (AMD), Intel and GNU.
+        self.spec.mpicc  = os.path.join(self.prefix.bin, 'mpicc')
+        self.spec.mpicxx = os.path.join(self.prefix.bin, 'mpicxx')
+        self.spec.mpif77 = os.path.join(self.prefix.bin, 'mpif77')
+        self.spec.mpifc  = os.path.join(self.prefix.bin, 'mpif90')
+
+    def make_base_environment(self, prefix, env):
+        env.set('MPICC',  os.path.join(prefix.bin, 'mpicc'))
+        env.set('MPICXX', os.path.join(prefix.bin, 'mpicxx'))
+        env.set('MPIF77', os.path.join(prefix.bin, 'mpif77'))
+        env.set('MPIF90', os.path.join(prefix.bin, 'mpif90'))
+        env.prepend_path('LD_LIBRARY_PATH', prefix.lib)
+        env.set('OPAL_PREFIX', prefix)
+
+    def setup_dependent_build_environment(self, env, dependent_spec):
+        self.make_base_environment(self.prefix, env)
+
+    def setup_run_environment(self, env):
+        self.make_base_environment(self.prefix, env)