Merge topic 'msvc_cuda_files_use_consistent_obj_names'

fa583869 CUDA: Use MSVC default pattern for naming object files

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1722

Source/cmVisualStudio10TargetGenerator.cxx

@@ -2078,9 +2078,15 @@ bool cmVisualStudio10TargetGenerator::OutputSourceSpecificFlags(
     (*this->BuildFileStream) << firstString;
     firstString = "";
     hasFlags = true;
-    this->WriteString("<ObjectFileName>", 3);
-    (*this->BuildFileStream) << "$(IntDir)/" << objectName
-                             << "</ObjectFileName>\n";
+    if (lang == "CUDA") {
+      this->WriteString("<CompileOut>", 3);
+      (*this->BuildFileStream) << "$(IntDir)/" << objectName
+                               << "</CompileOut>\n";
+    } else {
+      this->WriteString("<ObjectFileName>", 3);
+      (*this->BuildFileStream) << "$(IntDir)/" << objectName
+                               << "</ObjectFileName>\n";
+    }
   }
   for (std::string const& config : this->Configurations) {
     std::string configUpper = cmSystemTools::UpperCase(config);
@@ -2688,6 +2694,11 @@ bool cmVisualStudio10TargetGenerator::ComputeCudaOptions(
     cudaOptions.AddFlag("GPUDebugInfo", "false");
   }
 
+  // The extension on object libraries the CUDA gives isn't
+  // consistent with how MSVC generates object libraries for C+, so set
+  // the default to not have any extension
+  cudaOptions.AddFlag("CompileOut", "$(IntDir)%(Filename).obj");
+
   bool notPtx = true;
   if (this->GeneratorTarget->GetPropertyAsBool("CUDA_SEPARABLE_COMPILATION")) {
     cudaOptions.AddFlag("GenerateRelocatableDeviceCode", "true");

Tests/Cuda/ObjectLibrary/CMakeLists.txt

@@ -1,15 +1,18 @@
 cmake_minimum_required(VERSION 3.7)
 project (CudaObjectLibrary CUDA CXX)
 #Goal for this example:
-
-#build a object files some with cuda and some without than
-#embed these into an executable
+#
+#Build C++ and CUDA object files and than use them to make an executable
+#Make sure that CMake logic to handle object output when multiple files
+#with the same name works
+add_subdirectory(Conflicts)
 
 add_library(CudaMixedObjectLib OBJECT static.cu static.cpp)
 
 add_executable(CudaObjectLibrary
                main.cpp
-               $<TARGET_OBJECTS:CudaMixedObjectLib>)
+               $<TARGET_OBJECTS:CudaMixedObjectLib>
+               $<TARGET_OBJECTS:CudaConflicts>)
 
 if(APPLE)
   # Help the static cuda runtime find the driver (libcuda.dyllib) at runtime.

Tests/Cuda/ObjectLibrary/Conflicts/CMakeLists.txt

@@ -0,0 +1,2 @@
+
+add_library(CudaConflicts OBJECT static.cu)

Tests/Cuda/ObjectLibrary/Conflicts/static.cu

@@ -0,0 +1,17 @@
+
+#include <cuda.h>
+#include <cuda_runtime.h>
+#include <iostream>
+
+int __host__ cu2_sq_func(int x)
+{
+  cudaError_t err;
+  int nDevices = 0;
+  err = cudaGetDeviceCount(&nDevices);
+  if (err != cudaSuccess) {
+    std::cerr << "nDevices: " << nDevices << std::endl;
+    std::cerr << "err: " << err << std::endl;
+    return 1;
+  }
+  return x * x;
+}

Tests/Cuda/ObjectLibrary/main.cpp

@@ -1,22 +1,18 @@
 
 #include <iostream>
 
-int static_func(int);
-int file1_sq_func(int);
+int cpp_sq_func(int);
+int cu1_sq_func(int);
+int cu2_sq_func(int);
 
-int test_functions()
+bool test_functions()
 {
-  return file1_sq_func(static_func(42));
+  return (cu1_sq_func(42) == cpp_sq_func(42)) &&
+    (cu2_sq_func(42) == cpp_sq_func(42));
 }
 
 int main(int argc, char** argv)
 {
-  if (test_functions() == 1) {
-    return 1;
-  }
-  std::cout
-    << "this executable doesn't use cuda code, just call methods defined"
-    << std::endl;
-  std::cout << "in object files that have cuda code" << std::endl;
-  return 0;
+  int result = test_functions() ? 0 : 1;
+  return result;
 }

Tests/Cuda/ObjectLibrary/static.cpp

@@ -1,6 +1,6 @@
 int file1_sq_func(int);
 
-int static_func(int x)
+int cpp_sq_func(int x)
 {
-  return file1_sq_func(x);
+  return x * x;
 }

Tests/Cuda/ObjectLibrary/static.cu

@@ -3,7 +3,7 @@
 #include <cuda_runtime.h>
 #include <iostream>
 
-int __host__ file1_sq_func(int x)
+int __host__ cu1_sq_func(int x)
 {
   cudaError_t err;
   int nDevices = 0;
@@ -13,9 +13,5 @@ int __host__ file1_sq_func(int x)
     std::cerr << "err: " << err << std::endl;
     return 1;
   }
-  std::cout << "this library uses cuda code" << std::endl;
-  std::cout << "you have " << nDevices << " devices that support cuda"
-            << std::endl;
-
   return x * x;
 }