intel-oneapi-mkl: add hpcx-mpi to the list of supported MPI libs (spack#39625)

Co-authored-by: Loris Ercole <[email protected]>

Author: lorisercole

var/spack/repos/builtin/packages/intel-oneapi-mkl/package.py

@@ -201,14 +201,16 @@ def _find_mkl_libs(self, shared):
                 ]
             ):
                 libs.append(self._xlp64_lib("libmkl_blacs_intelmpi"))
-            elif any(self.spec.satisfies(m) for m in ["^openmpi", "mpi_family=openmpi"]):
+            elif any(
+                self.spec.satisfies(m) for m in ["^openmpi", "^hpcx-mpi", "mpi_family=openmpi"]
+            ):
                 libs.append(self._xlp64_lib("libmkl_blacs_openmpi"))
             else:
                 raise RuntimeError(
                     (
-                        "intel-oneapi-mpi +cluster requires one of ^intel-oneapi-mpi, "
+                        "intel-oneapi-mkl +cluster requires one of ^intel-oneapi-mpi, "
                         "^intel-mpi, ^mpich, ^cray-mpich, mpi_family=mpich, ^openmpi, "
-                        "or mpi_family=openmpi"
+                        "^hpcx-mpi, or mpi_family=openmpi"
                     )
                 )