intel-oneapi-mpi/mkl packages: add ilp64 support (#26045)

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

@@ -30,6 +30,9 @@ class IntelOneapiMkl(IntelOneApiLibraryPackage):
                 sha256='818b6bd9a6c116f4578cda3151da0612ec9c3ce8b2c8a64730d625ce5b13cc0c',
                 expand=False)
 
+    variant('ilp64', default=False,
+            description='Build with ILP64 support')
+
     depends_on('intel-oneapi-tbb')
 
     provides('fftw-api@3')
@@ -42,10 +45,20 @@ class IntelOneapiMkl(IntelOneApiLibraryPackage):
     def component_dir(self):
         return 'mkl'
 
+    def xlp64_lib(self, lib):
+        return lib + ('_ilp64'
+                      if '+ilp64' in self.spec
+                      else '_lp64')
+
+    @property
+    def headers(self):
+        include_path = join_path(self.component_path, 'include')
+        return find_headers('*', include_path)
+
     @property
     def libs(self):
-        lib_path = join_path(self.component_path, 'lib', 'intel64')
+        mkl_libs = [self.xlp64_lib('libmkl_intel'), 'libmkl_sequential', 'libmkl_core']
-        mkl_libs = ['libmkl_intel_lp64', 'libmkl_sequential', 'libmkl_core']
+        libs = find_libraries(mkl_libs,
-        libs = find_libraries(mkl_libs, root=lib_path, shared=True, recursive=False)
+                              join_path(self.component_path, 'lib', 'intel64'))
-        libs += find_system_libraries(['libpthread', 'libm', 'libdl'], shared=True)
+        libs += find_system_libraries(['libpthread', 'libm', 'libdl'])
         return libs

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

@@ -4,6 +4,7 @@
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 
 
+import glob
 import platform
 import subprocess
 
@@ -31,7 +32,10 @@ class IntelOneapiMpi(IntelOneApiLibraryPackage):
                 sha256='8b7693a156c6fc6269637bef586a8fd3ea6610cac2aae4e7f48c1fbb601625fe',
                 expand=False)
 
-    provides('mpi@:3')
+    variant('ilp64', default=False,
+            description='Build with ILP64 support')
+
+    provides('mpi@:3.1')
 
     depends_on('patchelf', type='build')
 
@@ -61,26 +65,36 @@ def setup_dependent_build_environment(self, env, dependent_spec):
         env.set('MPIF90', join_path(dir, 'mpif90'))
         env.set('MPIFC', join_path(dir, 'mpifc'))
 
+    @property
+    def headers(self):
+        include_path = join_path(self.component_path, 'include')
+        headers = find_headers('*', include_path)
+        if '+ilp64' in self.spec:
+            headers += find_headers('*', join_path(include_path, 'ilp64'))
+        return headers
+
     @property
     def libs(self):
+        lib_dir = join_path(self.component_path, 'lib')
+        release_lib_dir = join_path(lib_dir, 'release')
         libs = []
-        for dir in [join_path('lib', 'release_mt'),
+        if '+ilp64' in self.spec:
-                    'lib',
+            libs += find_libraries('libmpi_ilp64', release_lib_dir)
-                    join_path('libfabric', 'lib')]:
+        libs += find_libraries(['libmpicxx', 'libmpifort'], lib_dir)
-            lib_path = join_path(self.component_path, dir)
+        libs += find_libraries('libmpi', release_lib_dir)
-            ldir = find_libraries('*', root=lib_path, shared=True, recursive=False)
+        libs += find_system_libraries(['libdl', 'librt', 'libpthread'])
-            libs += ldir
         return libs
 
     def install(self, spec, prefix):
         super(IntelOneapiMpi, self).install(spec, prefix)
 
-        # need to patch libmpi.so so it can always find libfabric
+        # Patch libmpi.so rpath so it can find libfabric
         libfabric_rpath = join_path(self.component_path, 'libfabric', 'lib')
-        for lib_version in ['debug', 'release', 'release_mt', 'debug_mt']:
+        for libmpi in glob.glob(join_path(self.component_path,
-            file = join_path(self.component_path, 'lib', lib_version, 'libmpi.so')
+                                          'lib', '**', 'libmpi*.so')):
-            subprocess.call(['patchelf', '--set-rpath', libfabric_rpath, file])
+            subprocess.call(['patchelf', '--set-rpath', libfabric_rpath, libmpi])
 
+        # When spack builds from source
         # fix I_MPI_SUBSTITUTE_INSTALLDIR and
         #   __EXEC_PREFIX_TO_BE_FILLED_AT_INSTALL_TIME__
         scripts = ["mpif77", "mpif90", "mpigcc", "mpigxx", "mpiicc", "mpiicpc",