CUDA: Fix default compiler flags on Windows

Fix the default values of `CMAKE_CUDA_FLAGS[_<CONFIG>]` on Windows to
make the host compiler flags match those produced for C++ by the
`Platform/Windows-MSVC` module.  This makes the flags consistent with
those used for C++.

Modules/Compiler/NVIDIA-CUDA.cmake

@@ -7,16 +7,15 @@ if(NOT "x${CMAKE_CUDA_SIMULATE_ID}" STREQUAL "xMSVC")
   # CMAKE_SHARED_LIBRARY_CUDA_FLAGS is sent to the host linker so we
   # don't need to forward it through nvcc.
   set(CMAKE_SHARED_LIBRARY_CUDA_FLAGS -fPIC)
+  string(APPEND CMAKE_CUDA_FLAGS_INIT " ")
+  string(APPEND CMAKE_CUDA_FLAGS_DEBUG_INIT " -g")
+  string(APPEND CMAKE_CUDA_FLAGS_RELEASE_INIT " -O3 -DNDEBUG")
+  string(APPEND CMAKE_CUDA_FLAGS_MINSIZEREL_INIT " -O1 -DNDEBUG")
+  string(APPEND CMAKE_CUDA_FLAGS_RELWITHDEBINFO_INIT " -O2 -g -DNDEBUG")
 endif()
 set(CMAKE_SHARED_LIBRARY_CREATE_CUDA_FLAGS -shared)
 set(CMAKE_INCLUDE_SYSTEM_FLAG_CUDA -isystem=)
 
-string(APPEND CMAKE_CUDA_FLAGS_INIT " ")
-string(APPEND CMAKE_CUDA_FLAGS_DEBUG_INIT " -g")
-string(APPEND CMAKE_CUDA_FLAGS_MINSIZEREL_INIT " -O1 -DNDEBUG")
-string(APPEND CMAKE_CUDA_FLAGS_RELEASE_INIT " -O3 -DNDEBUG")
-string(APPEND CMAKE_CUDA_FLAGS_RELWITHDEBINFO_INIT " -O2 -g -DNDEBUG")
-
 if("x${CMAKE_CUDA_SIMULATE_ID}" STREQUAL "xMSVC")
   set(CMAKE_CUDA_STANDARD_DEFAULT "")
 else()

Modules/Platform/Windows-NVIDIA-CUDA.cmake

@@ -35,10 +35,12 @@ set(CMAKE_CUDA_DEVICE_LINK_LIBRARY
 set(CMAKE_CUDA_DEVICE_LINK_EXECUTABLE
   "<CMAKE_CUDA_COMPILER> <FLAGS> <CMAKE_CUDA_LINK_FLAGS> -shared -dlink <OBJECTS> -o <TARGET> <LINK_LIBRARIES> -Xcompiler=-Fd<TARGET_COMPILE_PDB>,-FS")
 
-string(APPEND CMAKE_CUDA_FLAGS_INIT " -Xcompiler=-GR,-EHsc")
-string(APPEND CMAKE_CUDA_FLAGS_DEBUG_INIT " -Xcompiler=-MDd,-Zi,-RTC1")
-string(APPEND CMAKE_CUDA_FLAGS_RELEASE_INIT " -Xcompiler=-MD")
-string(APPEND CMAKE_CUDA_FLAGS_RELWITHDEBINFO_INIT " -Xcompiler=-MD")
-string(APPEND CMAKE_CUDA_FLAGS_MINSIZEREL_INIT " -Xcompiler=-MD")
+string(REPLACE "/D" "-D" _PLATFORM_DEFINES_CUDA "${_PLATFORM_DEFINES}${_PLATFORM_DEFINES_CXX}")
+
+string(APPEND CMAKE_CUDA_FLAGS_INIT " ${PLATFORM_DEFINES_CUDA} -D_WINDOWS -Xcompiler=\"/W3${_FLAGS_CXX}\"")
+string(APPEND CMAKE_CUDA_FLAGS_DEBUG_INIT " -Xcompiler=\"-MDd -Zi -Ob0 -Od ${_RTC1}\"")
+string(APPEND CMAKE_CUDA_FLAGS_RELEASE_INIT " -Xcompiler=\"-MD -O2 -Ob2\" -DNDEBUG")
+string(APPEND CMAKE_CUDA_FLAGS_RELWITHDEBINFO_INIT " -Xcompiler=\"-MD -Zi -O2 -Ob1\" -DNDEBUG")
+string(APPEND CMAKE_CUDA_FLAGS_MINSIZEREL_INIT " -Xcompiler=\"-MD -O1 -Ob1\" -DNDEBUG")
 
 set(CMAKE_CUDA_STANDARD_LIBRARIES_INIT "${CMAKE_C_STANDARD_LIBRARIES_INIT}")