CUDA/Clang: Fix separable compilation in non-root directories with Makefiles

Seems the relative paths were wrong basically all around such that only
compiling files in the top-level directory would work. I've modified
CudaOnly.SeparateCompilation to cover this.

Fixes #22482.

4 files changed, 22 insertions, 21 deletions

diff --git a/Tests/CudaOnly/CMakeLists.txt b/Tests/CudaOnly/CMakeLists.txt
index fdb7a6e..a3fb409 100644
--- a/Tests/CudaOnly/CMakeLists.txt
+++ b/Tests/CudaOnly/CMakeLists.txt
@@ -15,7 +15,7 @@ add_cuda_test_macro(CudaOnly.ToolkitBeforeLang CudaOnlyToolkitBeforeLang)
 add_cuda_test_macro(CudaOnly.WithDefs CudaOnlyWithDefs)
 add_cuda_test_macro(CudaOnly.CircularLinkLine CudaOnlyCircularLinkLine)
 add_cuda_test_macro(CudaOnly.ResolveDeviceSymbols CudaOnlyResolveDeviceSymbols)
-add_cuda_test_macro(CudaOnly.SeparateCompilation CudaOnlySeparateCompilation)
+add_cuda_test_macro(CudaOnly.SeparateCompilation main/CudaOnlySeparateCompilation)
 
 if(CMake_TEST_CUDA AND NOT CMake_TEST_CUDA STREQUAL "Clang")
   # Clang doesn't have flags for selecting the runtime.
diff --git a/Tests/CudaOnly/SeparateCompilation/CMakeLists.txt b/Tests/CudaOnly/SeparateCompilation/CMakeLists.txt
index 864ecbf..17069e3 100644
--- a/Tests/CudaOnly/SeparateCompilation/CMakeLists.txt
+++ b/Tests/CudaOnly/SeparateCompilation/CMakeLists.txt
@@ -34,26 +34,9 @@ add_library(CUDASeparateLibB STATIC file4.cu file5.cu)
 target_compile_features(CUDASeparateLibB PRIVATE cuda_std_11)
 target_link_libraries(CUDASeparateLibB PRIVATE CUDASeparateLibA)
 
-add_executable(CudaOnlySeparateCompilation main.cu)
-target_link_libraries(CudaOnlySeparateCompilation
-                      PRIVATE CUDASeparateLibB)
-set_target_properties(CudaOnlySeparateCompilation PROPERTIES CUDA_STANDARD 11)
-set_target_properties(CudaOnlySeparateCompilation PROPERTIES CUDA_STANDARD_REQUIRED TRUE)
-
 set_target_properties(CUDASeparateLibA
                       CUDASeparateLibB
                       PROPERTIES CUDA_SEPARABLE_COMPILATION ON
                       POSITION_INDEPENDENT_CODE ON)
 
-if (CMAKE_GENERATOR MATCHES "^Visual Studio")
-  #Visual Studio CUDA integration will not perform device linking
-  #on a target that itself does not have GenerateRelocatableDeviceCode
-  #enabled.
-  set_target_properties(CudaOnlySeparateCompilation
-                        PROPERTIES CUDA_SEPARABLE_COMPILATION ON)
-endif()
-
-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()
+add_subdirectory(main)
diff --git a/Tests/CudaOnly/SeparateCompilation/main/CMakeLists.txt b/Tests/CudaOnly/SeparateCompilation/main/CMakeLists.txt
new file mode 100644
index 0000000..c181078
--- /dev/null
+++ b/Tests/CudaOnly/SeparateCompilation/main/CMakeLists.txt
@@ -0,0 +1,18 @@
+add_executable(CudaOnlySeparateCompilation main.cu)
+target_link_libraries(CudaOnlySeparateCompilation PRIVATE CUDASeparateLibB)
+set_target_properties(CudaOnlySeparateCompilation PROPERTIES
+  CUDA_STANDARD 11
+  CUDA_STANDARD_REQUIRED TRUE
+)
+
+if(CMAKE_GENERATOR MATCHES "^Visual Studio")
+  # Visual Studio CUDA integration will not perform device linking
+  # on a target that itself does not have GenerateRelocatableDeviceCode
+  # enabled.
+  set_property(TARGET CudaOnlySeparateCompilation PROPERTY CUDA_SEPARABLE_COMPILATION ON)
+endif()
+
+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()
diff --git a/Tests/CudaOnly/SeparateCompilation/main.cu b/Tests/CudaOnly/SeparateCompilation/main/main.cu
index 40dbe5d..2b6e8f4 100644
--- a/Tests/CudaOnly/SeparateCompilation/main.cu
+++ b/Tests/CudaOnly/SeparateCompilation/main/main.cu
@@ -1,8 +1,8 @@
 
 #include <iostream>
 
-#include "file1.h"
-#include "file2.h"
+#include "../file1.h"
+#include "../file2.h"
 
 int file4_launch_kernel(int x);
 int file5_launch_kernel(int x);