creating a single unit test executable if CUDA version is 10.2 or higher

CMakeLists.txt

@@ -68,14 +68,20 @@ alpaka_add_executable(VerifyHeap EXCLUDE_FROM_ALL tests/verify_heap.cpp tests/ve
 target_include_directories(VerifyHeap PUBLIC ${CMAKE_CURRENT_LIST_DIR}/src/include)
 target_link_libraries(VerifyHeap PUBLIC alpaka::alpaka warnings)
 
-# the catch2 main needs to be in a non-CUDA file before CUDA 10.2, because nvcc fails to compile the catch2 header
-# TODO: merge the test_main back into the tests exe, once CUDA 10.2 is the minimum version
-add_library(tests_main EXCLUDE_FROM_ALL tests/main.cpp)
-target_include_directories(tests_main PUBLIC ${CMAKE_CURRENT_LIST_DIR}/src/include)
-target_link_libraries(tests_main PUBLIC Catch2::Catch2 warnings)
+if (CUDA_VERSION VERSION_LESS 10.2) # TODO(bgruber): I do not know exactly where it breaks. 9.1 does not work, 10.2 works
+    # the catch2 main needs to be in a non-CUDA file before CUDA 10.2, because nvcc fails to compile the catch2 header
+    # TODO: merge the test_main back into the tests exe, once CUDA 10.2 is the minimum version
+    add_library(tests_main EXCLUDE_FROM_ALL tests/main.cpp)
+    target_include_directories(tests_main PUBLIC ${CMAKE_CURRENT_LIST_DIR}/src/include)
+    target_link_libraries(tests_main PUBLIC Catch2::Catch2 warnings)
 
-alpaka_add_executable(tests EXCLUDE_FROM_ALL tests/dimensions.cpp)
-target_include_directories(tests PUBLIC ${CMAKE_CURRENT_LIST_DIR}/src/include)
-target_link_libraries(tests PUBLIC tests_main alpaka::alpaka Catch2::Catch2 warnings)
+    alpaka_add_executable(tests EXCLUDE_FROM_ALL tests/dimensions.cpp)
+    target_include_directories(tests PUBLIC ${CMAKE_CURRENT_LIST_DIR}/src/include)
+    target_link_libraries(tests PUBLIC tests_main alpaka::alpaka Catch2::Catch2 warnings)
+else()
+    alpaka_add_executable(tests EXCLUDE_FROM_ALL tests/main.cpp tests/dimensions.cpp)
+    target_include_directories(tests PUBLIC ${CMAKE_CURRENT_LIST_DIR}/src/include)
+    target_link_libraries(tests PUBLIC alpaka::alpaka Catch2::Catch2 warnings)
+endif()
 
 add_custom_target(examples DEPENDS mallocMC_Example01 mallocMC_Example03 VerifyHeap)