attempt to fix mpiexec in CI

.gitlab-ci.yml

@@ -35,6 +35,8 @@ typecheck:
     - cd build/${cmakePresetName}
     - cmake --build . --target SfgTests
     - cmake --build . --target UserManualExamples
+  environment:
+    TESTSUITE_MPIEXEC_FLAGS: --oversubscribe --allow-run-as-root
   script:
     - ctest --output-on-failure
 

tests/BasicLbmScenarios/CMakeLists.txt

@@ -12,7 +12,7 @@ add_dependencies( SfgTests TestBasicLbmScenariosCPU )
 
 foreach( TestID ${TestIDs} )
 foreach( NumProcs 1 2 4 )
-    add_test( NAME "BasicLbmScenarios - CPU - ${NumProcs} Processes - ${TestID}" COMMAND mpiexec -c ${NumProcs} TestBasicLbmScenariosCPU ${TestID} )
+    add_test( NAME "BasicLbmScenarios - CPU - ${NumProcs} Processes - ${TestID}" COMMAND mpiexec -c ${NumProcs} ${_SFG_TESTSUITE_MPIEXEC_FLAGS} TestBasicLbmScenariosCPU ${TestID} )
 endforeach()
 endforeach()
 
@@ -42,7 +42,7 @@ if( $CACHE{WALBERLA_BUILD_WITH_HIP} )
 
     foreach( TestID ${TestIDs} )
     foreach( NumProcs 1 2 4 )
-        add_test( NAME "BasicLbmScenarios - HIP -  ${NumProcs} Processes - ${TestID}" COMMAND mpiexec -c ${NumProcs} TestBasicLbmScenariosHIP ${TestID} )
+        add_test( NAME "BasicLbmScenarios - HIP -  ${NumProcs} Processes - ${TestID}" COMMAND mpiexec -c ${NumProcs} ${_SFG_TESTSUITE_MPIEXEC_FLAGS} TestBasicLbmScenariosHIP ${TestID} )
     endforeach()
     endforeach()
 endif()

tests/CMakeLists.txt

@@ -17,6 +17,11 @@ set(WALBERLA_BUILD_TUTORIALS OFF CACHE BOOL "")
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED)
 
+set(
+    _SFG_TESTSUITE_MPIEXEC_FLAGS
+    $ENV{TESTSUITE_MPIEXEC_FLAGS}
+)
+
 include(FetchContent)
 
 FetchContent_Declare(