Tests: Simplify CUDA rpath on macOS

Use the `BUILD_RPATH` property and reference the CMake-computed location
of the runtime libraries.

Tests/Cuda/Complex/CMakeLists.txt

@@ -42,7 +42,6 @@ add_executable(CudaComplex main.cpp)
 target_link_libraries(CudaComplex PUBLIC CudaComplexMixedLib)
 
 if(APPLE)
-  # We need to add the default path to the driver (libcuda.dylib) as an rpath, so that
-  # the static cuda runtime can find it at runtime.
-  target_link_libraries(CudaComplex PRIVATE -Wl,-rpath,/usr/local/cuda/lib)
+  # Help the static cuda runtime find the driver (libcuda.dyllib) at runtime.
+  set_property(TARGET CudaComplex PROPERTY BUILD_RPATH ${CMAKE_CUDA_IMPLICIT_LINK_DIRECTORIES})
 endif()

Tests/Cuda/ObjectLibrary/CMakeLists.txt

@@ -10,8 +10,8 @@ add_library(CudaMixedObjectLib OBJECT static.cu static.cpp)
 add_executable(CudaObjectLibrary
                main.cpp
                $<TARGET_OBJECTS:CudaMixedObjectLib>)
+
 if(APPLE)
-  # We need to add the default path to the driver (libcuda.dylib) as an rpath, so that
-  # the static cuda runtime can find it at runtime.
-  target_link_libraries(CudaObjectLibrary PRIVATE -Wl,-rpath,/usr/local/cuda/lib)
+  # Help the static cuda runtime find the driver (libcuda.dyllib) at runtime.
+  set_property(TARGET CudaObjectLibrary PROPERTY BUILD_RPATH ${CMAKE_CUDA_IMPLICIT_LINK_DIRECTORIES})
 endif()

Tests/Cuda/WithC/CMakeLists.txt

@@ -6,7 +6,6 @@ string(APPEND CMAKE_CUDA_FLAGS " -gencode arch=compute_30,code=compute_30")
 add_executable(CudaWithC main.c cuda.cu)
 
 if(APPLE)
-  # We need to add the default path to the driver (libcuda.dylib) as an rpath, so that
-  # the static cuda runtime can find it at runtime.
-  target_link_libraries(CudaWithC PRIVATE -Wl,-rpath,/usr/local/cuda/lib)
+  # Help the static cuda runtime find the driver (libcuda.dyllib) at runtime.
+  set_property(TARGET CudaWithC PROPERTY BUILD_RPATH ${CMAKE_CUDA_IMPLICIT_LINK_DIRECTORIES})
 endif()

Tests/CudaOnly/ExportPTX/CMakeLists.txt

@@ -67,9 +67,8 @@ target_compile_definitions(CudaOnlyExportPTX PRIVATE
                            "CONFIG_TYPE=gen_$<LOWER_CASE:$<CONFIG>>")
 
 if(APPLE)
-  # We need to add the default path to the driver (libcuda.dylib) as an rpath, so that
-  # the static cuda runtime can find it at runtime.
-  target_link_libraries(CudaOnlyExportPTX PRIVATE -Wl,-rpath,/usr/local/cuda/lib)
+  # Help the static cuda runtime find the driver (libcuda.dyllib) at runtime.
+  set_property(TARGET CudaOnlyExportPTX PROPERTY BUILD_RPATH ${CMAKE_CUDA_IMPLICIT_LINK_DIRECTORIES})
 endif()
 
 #Verify that we can install object targets properly

Tests/CudaOnly/ResolveDeviceSymbols/CMakeLists.txt

@@ -46,7 +46,6 @@ add_executable(CudaOnlyResolveDeviceSymbols main.cu)
 target_link_libraries(CudaOnlyResolveDeviceSymbols PRIVATE CUDAResolveDeviceLib)
 
 if(APPLE)
-  # We need to add the default path to the driver (libcuda.dylib) as an rpath, so that
-  # the static cuda runtime can find it at runtime.
-  target_link_libraries(CudaOnlyResolveDeviceSymbols PRIVATE -Wl,-rpath,/usr/local/cuda/lib)
+  # Help the static cuda runtime find the driver (libcuda.dyllib) at runtime.
+  set_property(TARGET CudaOnlyResolveDeviceSymbols PROPERTY BUILD_RPATH ${CMAKE_CUDA_IMPLICIT_LINK_DIRECTORIES})
 endif()

Tests/CudaOnly/SeparateCompilation/CMakeLists.txt

@@ -39,8 +39,7 @@ if (CMAKE_GENERATOR MATCHES "^Visual Studio")
                         PROPERTIES CUDA_SEPARABLE_COMPILATION ON)
 endif()
 
-if (APPLE)
-  # We need to add the default path to the driver (libcuda.dylib) as an rpath, so that
-  # the static cuda runtime can find it at runtime.
-  target_link_libraries(CudaOnlySeparateCompilation PRIVATE -Wl,-rpath,/usr/local/cuda/lib)
+if(APPLE)
+  # Help the static cuda runtime find the driver (libcuda.dyllib) at runtime.
+  set_property(TARGET CudaOnlySeparateCompilation PROPERTY BUILD_RPATH ${CMAKE_CUDA_IMPLICIT_LINK_DIRECTORIES})
 endif()

Tests/CudaOnly/WithDefs/CMakeLists.txt

@@ -36,8 +36,7 @@ target_compile_definitions(CudaOnlyWithDefs
     $<$<CONFIG:RELEASE>:$<BUILD_INTERFACE:${release_compile_defs}>>
   )
 
-#we need to add an rpath for the cuda library so that everything
-#loads properly on the mac
-if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
-  set_target_properties(CudaOnlyWithDefs PROPERTIES LINK_FLAGS "-Wl,-rpath,${CMAKE_CUDA_IMPLICIT_LINK_DIRECTORIES}")
+if(APPLE)
+  # Help the static cuda runtime find the driver (libcuda.dyllib) at runtime.
+  set_property(TARGET CudaOnlyWithDefs PROPERTY BUILD_RPATH ${CMAKE_CUDA_IMPLICIT_LINK_DIRECTORIES})
 endif()