intel-oneapi-mpi: virtual provider support (#20732)

Set up environment and dependent packages properly when building
with intel-oneapi-mpi as a dependency MPI provider (e.g. point to
mpicc compiler wrapper).

1 files changed, 14 insertions, 0 deletions

diff --git a/var/spack/repos/builtin/packages/intel-oneapi-mpi/package.py b/var/spack/repos/builtin/packages/intel-oneapi-mpi/package.py
index c3b5e37f6d..b95518199f 100644
--- a/var/spack/repos/builtin/packages/intel-oneapi-mpi/package.py
+++ b/var/spack/repos/builtin/packages/intel-oneapi-mpi/package.py
@@ -28,6 +28,20 @@ class IntelOneapiMpi(IntelOneApiLibraryPackage):
                             url_name='mpi_oneapi')
         super(IntelOneapiMpi, self).__init__(spec)
 
+    def setup_dependent_package(self, module, dep_spec):
+        dir = join_path(self.prefix, 'mpi', 'latest', 'bin')
+        self.spec.mpicc  = join_path(dir, 'mpicc')
+        self.spec.mpicxx = join_path(dir, 'mpicxx')
+        self.spec.mpif77 = join_path(dir, 'mpif77')
+        self.spec.mpifc  = join_path(dir, 'mpifc')
+
+    def setup_dependent_build_environment(self, env, dependent_spec):
+        env.set('MPICH_CC', spack_cc)
+        env.set('MPICH_CXX', spack_cxx)
+        env.set('MPICH_F77', spack_f77)
+        env.set('MPICH_F90', spack_fc)
+        env.set('MPICH_FC', spack_fc)
+
     @property
     def libs(self):
         libs = []