Merge topic 'cuda-device-link-only-cuda' into release-3.16

7ffa42288e Merge branch 'backport-3.15-cuda-device-link-only-cuda'
071c4f1a2a CUDA: Do not device link if target has no CUDA usage

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4191

4 files changed, 26 insertions, 17 deletions

diff --git a/Source/cmLinkLineDeviceComputer.cxx b/Source/cmLinkLineDeviceComputer.cxx
index d845652..847334b 100644
--- a/Source/cmLinkLineDeviceComputer.cxx
+++ b/Source/cmLinkLineDeviceComputer.cxx
@@ -183,29 +183,29 @@ bool requireDeviceLinking(cmGeneratorTarget& target, cmLocalGenerator& lg,
     return cmIsOn(resolveDeviceSymbols);
   }
 
-  if (const char* separableCompilation =
-        target.GetProperty("CUDA_SEPARABLE_COMPILATION")) {
-    if (cmIsOn(separableCompilation)) {
-      bool doDeviceLinking = false;
-      switch (target.GetType()) {
-        case cmStateEnums::SHARED_LIBRARY:
-        case cmStateEnums::MODULE_LIBRARY:
-        case cmStateEnums::EXECUTABLE:
-          doDeviceLinking = true;
-          break;
-        default:
-          break;
-      }
-      return doDeviceLinking;
-    }
-  }
-
   // Determine if we have any dependencies that require
   // us to do a device link step
   cmGeneratorTarget::LinkClosure const* closure =
     target.GetLinkClosure(config);
 
   if (cmContains(closure->Languages, "CUDA")) {
+    if (const char* separableCompilation =
+          target.GetProperty("CUDA_SEPARABLE_COMPILATION")) {
+      if (cmIsOn(separableCompilation)) {
+        bool doDeviceLinking = false;
+        switch (target.GetType()) {
+          case cmStateEnums::SHARED_LIBRARY:
+          case cmStateEnums::MODULE_LIBRARY:
+          case cmStateEnums::EXECUTABLE:
+            doDeviceLinking = true;
+            break;
+          default:
+            break;
+        }
+        return doDeviceLinking;
+      }
+    }
+
     cmComputeLinkInformation* pcli = target.GetLinkInformation(config);
     if (pcli) {
       cmLinkLineDeviceComputer deviceLinkComputer(
diff --git a/Tests/Cuda/CMakeLists.txt b/Tests/Cuda/CMakeLists.txt
index a30071f..44c6005 100644
--- a/Tests/Cuda/CMakeLists.txt
+++ b/Tests/Cuda/CMakeLists.txt
@@ -4,6 +4,7 @@ ADD_TEST_MACRO(Cuda.ConsumeCompileFeatures CudaConsumeCompileFeatures)
 ADD_TEST_MACRO(Cuda.ObjectLibrary CudaObjectLibrary)
 ADD_TEST_MACRO(Cuda.MixedStandardLevels MixedStandardLevels)
 ADD_TEST_MACRO(Cuda.NotEnabled CudaNotEnabled)
+ADD_TEST_MACRO(Cuda.SeparableCompCXXOnly SeparableCompCXXOnly)
 ADD_TEST_MACRO(Cuda.ToolkitInclude CudaToolkitInclude)
 ADD_TEST_MACRO(Cuda.ProperDeviceLibraries ProperDeviceLibraries)
 ADD_TEST_MACRO(Cuda.ProperLinkFlags ProperLinkFlags)
diff --git a/Tests/Cuda/SeparableCompCXXOnly/CMakeLists.txt b/Tests/Cuda/SeparableCompCXXOnly/CMakeLists.txt
new file mode 100644
index 0000000..97670e3
--- /dev/null
+++ b/Tests/Cuda/SeparableCompCXXOnly/CMakeLists.txt
@@ -0,0 +1,3 @@
+project(SeparableCompCXXOnly LANGUAGES CXX CUDA)
+set(CMAKE_CUDA_SEPARABLE_COMPILATION ON)
+add_executable(SeparableCompCXXOnly main.cpp)
diff --git a/Tests/Cuda/SeparableCompCXXOnly/main.cpp b/Tests/Cuda/SeparableCompCXXOnly/main.cpp
new file mode 100644
index 0000000..8135246
--- /dev/null
+++ b/Tests/Cuda/SeparableCompCXXOnly/main.cpp
@@ -0,0 +1,5 @@
+
+int main(int, char const* [])
+{
+  return 0;
+}