Merge pull request #4099 from Thyre/20260324152539_new_pr_superlu

avoid crash in superlu easyblock if OpenMPI is not a dependency

Author: jfgrimm

easybuild/easyblocks/s/superlu.py

@@ -142,12 +142,13 @@ def test_step(self):
         # allow oversubscription of number of processes over number of available cores with OpenMPI 3.0 & newer,
         # to avoid that some tests fail if only a handful of cores are available
         ompi_ver = get_software_version('OpenMPI')
-        if LooseVersion(ompi_ver) >= LooseVersion('5.0'):
-            if 'PRTE_MCA_rmaps_default_mapping_policy' not in self.cfg['pretestopts']:
-                self.cfg.update('pretestopts', "export PRTE_MCA_rmaps_default_mapping_policy=:oversubscribe && ")
-        elif LooseVersion(ompi_ver) >= LooseVersion('3.0'):
-            if 'OMPI_MCA_rmaps_base_oversubscribe' not in self.cfg['pretestopts']:
-                self.cfg.update('pretestopts', "export OMPI_MCA_rmaps_base_oversubscribe=true && ")
+        if ompi_ver:
+            if LooseVersion(ompi_ver) >= LooseVersion('5.0'):
+                if 'PRTE_MCA_rmaps_default_mapping_policy' not in self.cfg['pretestopts']:
+                    self.cfg.update('pretestopts', "export PRTE_MCA_rmaps_default_mapping_policy=:oversubscribe && ")
+            elif LooseVersion(ompi_ver) >= LooseVersion('3.0'):
+                if 'OMPI_MCA_rmaps_base_oversubscribe' not in self.cfg['pretestopts']:
+                    self.cfg.update('pretestopts', "export OMPI_MCA_rmaps_base_oversubscribe=true && ")
 
         super().test_step()