CUDA: Factor out helper to filter implicit link libraries

Prepare to use it for other languages.

Modules/CMakeDetermineCUDACompiler.cmake

@@ -439,23 +439,9 @@ elseif(CMAKE_CUDA_COMPILER_ID STREQUAL "NVIDIA")
     "set(CMAKE_CUDA_RUNTIME_LIBRARY_DEFAULT \"${CMAKE_CUDA_RUNTIME_LIBRARY_DEFAULT}\")")
 endif()
 
-# CMAKE_CUDA_HOST_IMPLICIT_LINK_LIBRARIES is detected above as the list of
-# libraries that the CUDA compiler implicitly passes to the host linker.
-# CMake invokes the host linker directly and so needs to pass these libraries.
-# We filter out those that should not be passed unconditionally both here
-# and from CMAKE_CUDA_IMPLICIT_LINK_LIBRARIES in CMakeTestCUDACompiler.
-set(CMAKE_CUDA_IMPLICIT_LINK_LIBRARIES_EXCLUDE
-  # The CUDA runtime libraries are controlled by CMAKE_CUDA_RUNTIME_LIBRARY.
-  cudart        cudart.lib
-  cudart_static cudart_static.lib
-  cudadevrt     cudadevrt.lib
-
-  # Dependencies of the CUDA static runtime library on Linux hosts.
-  rt
-  pthread
-  dl
-  )
-list(REMOVE_ITEM CMAKE_CUDA_HOST_IMPLICIT_LINK_LIBRARIES ${CMAKE_CUDA_IMPLICIT_LINK_LIBRARIES_EXCLUDE})
+include(Internal/CMakeCUDAFilterImplicitLibs)
+# Filter out implicit link libraries that should not be passed unconditionally.
+cmake_cuda_filter_implicit_libs(CMAKE_CUDA_HOST_IMPLICIT_LINK_LIBRARIES)
 
 if(CMAKE_CUDA_COMPILER_SYSROOT)
   string(CONCAT _SET_CMAKE_CUDA_COMPILER_SYSROOT

Modules/CMakeTestCUDACompiler.cmake

@@ -114,9 +114,9 @@ if("x${CMAKE_CUDA_SIMULATE_ID}" STREQUAL "xMSVC")
   set(CMAKE_CUDA_IMPLICIT_LINK_DIRECTORIES "${CMAKE_CUDA_HOST_IMPLICIT_LINK_DIRECTORIES}")
 endif()
 
+include(Internal/CMakeCUDAFilterImplicitLibs)
 # Filter out implicit link libraries that should not be passed unconditionally.
-# See CMAKE_CUDA_IMPLICIT_LINK_LIBRARIES_EXCLUDE in CMakeDetermineCUDACompiler.
-list(REMOVE_ITEM CMAKE_CUDA_IMPLICIT_LINK_LIBRARIES ${CMAKE_CUDA_IMPLICIT_LINK_LIBRARIES_EXCLUDE})
+cmake_cuda_filter_implicit_libs(CMAKE_CUDA_IMPLICIT_LINK_LIBRARIES)
 
 if(CMAKE_CUDA_COMPILER_ID STREQUAL "NVIDIA")
   include(Internal/CMakeNVCCFilterImplicitInfo)

Modules/Internal/CMakeCUDAFilterImplicitLibs.cmake

@@ -0,0 +1,20 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+# In CMakeDetermineCUDACompiler and CMakeTestCUDACompiler we detect
+# libraries that the CUDA compiler implicitly passes to the host linker.
+# CMake invokes the host linker directly and so needs to pass these libraries.
+# Filter out implicit link libraries that should not be passed unconditionally.
+macro(cmake_cuda_filter_implicit_libs _var_CMAKE_CUDA_IMPLICIT_LINK_LIBRARIES)
+  list(REMOVE_ITEM "${_var_CMAKE_CUDA_IMPLICIT_LINK_LIBRARIES}"
+    # The CUDA runtime libraries are controlled by CMAKE_CUDA_RUNTIME_LIBRARY.
+    cudart        cudart.lib
+    cudart_static cudart_static.lib
+    cudadevrt     cudadevrt.lib
+
+    # Dependencies of the CUDA static runtime library on Linux hosts.
+    rt
+    pthread
+    dl
+    )
+endmacro()