CUDA: Abstract language flag to compiler modules

Separate this detail out into compiler-specific modules.
Required for Clang support, as it uses slightly different language flags.

3 files changed, 11 insertions, 9 deletions

diff --git a/Modules/CMakeCUDAInformation.cmake b/Modules/CMakeCUDAInformation.cmake
index 974f5fa..f31713e 100644
--- a/Modules/CMakeCUDAInformation.cmake
+++ b/Modules/CMakeCUDAInformation.cmake
@@ -138,24 +138,24 @@ endif()
 #Specify how to compile when ptx has been requested
 if(NOT CMAKE_CUDA_COMPILE_PTX_COMPILATION)
   set(CMAKE_CUDA_COMPILE_PTX_COMPILATION
-    "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> -x cu -ptx <SOURCE> -o <OBJECT>")
+    "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> ${_CMAKE_COMPILE_AS_CUDA_FLAG} -ptx <SOURCE> -o <OBJECT>")
 endif()
 
 #Specify how to compile when separable compilation has been requested
 if(NOT CMAKE_CUDA_COMPILE_SEPARABLE_COMPILATION)
   set(CMAKE_CUDA_COMPILE_SEPARABLE_COMPILATION
-    "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> -x cu -dc <SOURCE> -o <OBJECT>")
+    "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> ${_CMAKE_COMPILE_AS_CUDA_FLAG} -dc <SOURCE> -o <OBJECT>")
 endif()
 
 #Specify how to compile when whole compilation has been requested
 if(NOT CMAKE_CUDA_COMPILE_WHOLE_COMPILATION)
   set(CMAKE_CUDA_COMPILE_WHOLE_COMPILATION
-    "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> -x cu -c <SOURCE> -o <OBJECT>")
+    "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> ${_CMAKE_COMPILE_AS_CUDA_FLAG} -c <SOURCE> -o <OBJECT>")
 endif()
 
-if(CMAKE_GENERATOR STREQUAL "Ninja" AND NOT CMAKE_DEPFILE_FLAGS_CUDA )
+if(CMAKE_GENERATOR STREQUAL "Ninja" AND NOT CMAKE_DEPFILE_FLAGS_CUDA)
   set(CMAKE_CUDA_COMPILE_DEPENDENCY_DETECTION
-    "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> -x cu -M <SOURCE> -MT <OBJECT> -o $DEP_FILE")
+    "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> ${_CMAKE_COMPILE_AS_CUDA_FLAG} -M <SOURCE> -MT <OBJECT> -o $DEP_FILE")
   #The Ninja generator uses the make file dependency files to determine what
   #files need to be recompiled. Unfortunately, nvcc < 10.2 doesn't support building
   #a source file and generating the dependencies of said file in a single
diff --git a/Modules/Compiler/NVIDIA-CUDA.cmake b/Modules/Compiler/NVIDIA-CUDA.cmake
index 1f4d54d..2a2564e 100644
--- a/Modules/Compiler/NVIDIA-CUDA.cmake
+++ b/Modules/Compiler/NVIDIA-CUDA.cmake
@@ -4,6 +4,8 @@ set(CMAKE_CUDA_COMPILER_HAS_DEVICE_LINK_PHASE True)
 set(CMAKE_CUDA_VERBOSE_FLAG "-v")
 set(CMAKE_CUDA_VERBOSE_COMPILE_FLAG "-Xcompiler=-v")
 
+set(_CMAKE_COMPILE_AS_CUDA_FLAG "-x cu")
+
 if (CMAKE_CUDA_COMPILER_VERSION VERSION_GREATER_EQUAL 10.2.89)
   # The -forward-unknown-to-host-compiler flag was only
   # added to nvcc in 10.2 so before that we had no good
diff --git a/Modules/Platform/Windows-NVIDIA-CUDA.cmake b/Modules/Platform/Windows-NVIDIA-CUDA.cmake
index af43f46..2f50280 100644
--- a/Modules/Platform/Windows-NVIDIA-CUDA.cmake
+++ b/Modules/Platform/Windows-NVIDIA-CUDA.cmake
@@ -1,11 +1,11 @@
 include(Platform/Windows-MSVC)
 
 set(CMAKE_CUDA_COMPILE_PTX_COMPILATION
-  "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> -x cu -ptx <SOURCE> -o <OBJECT> -Xcompiler=-Fd<TARGET_COMPILE_PDB>,-FS")
+  "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> ${_CMAKE_COMPILE_AS_CUDA_FLAG} -ptx <SOURCE> -o <OBJECT> -Xcompiler=-Fd<TARGET_COMPILE_PDB>,-FS")
 set(CMAKE_CUDA_COMPILE_SEPARABLE_COMPILATION
-  "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> -x cu -dc <SOURCE> -o <OBJECT> -Xcompiler=-Fd<TARGET_COMPILE_PDB>,-FS")
+  "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> ${_CMAKE_COMPILE_AS_CUDA_FLAG} -dc <SOURCE> -o <OBJECT> -Xcompiler=-Fd<TARGET_COMPILE_PDB>,-FS")
 set(CMAKE_CUDA_COMPILE_WHOLE_COMPILATION
-  "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> -x cu -c <SOURCE> -o <OBJECT> -Xcompiler=-Fd<TARGET_COMPILE_PDB>,-FS")
+  "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> ${_CMAKE_COMPILE_AS_CUDA_FLAG} -c <SOURCE> -o <OBJECT> -Xcompiler=-Fd<TARGET_COMPILE_PDB>,-FS")
 
 set(__IMPLICT_LINKS )
 foreach(dir ${CMAKE_CUDA_HOST_IMPLICIT_LINK_DIRECTORIES})
@@ -48,7 +48,7 @@ unset(__IMPLICT_DLINK_DIRS)
 set(CMAKE_CUDA_DEVICE_LINK_LIBRARY
   "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <LANGUAGE_COMPILE_FLAGS> ${_CMAKE_CUDA_EXTRA_DEVICE_LINK_FLAGS} -shared -dlink <OBJECTS> -o <TARGET> <LINK_LIBRARIES> -Xcompiler=-Fd<TARGET_COMPILE_PDB>,-FS${__IMPLICT_DLINK_FLAGS}")
 set(CMAKE_CUDA_DEVICE_LINK_EXECUTABLE
-  "<CMAKE_CUDA_COMPILER>  ${_CMAKE_CUDA_EXTRA_FLAGS} <FLAGS> ${_CMAKE_CUDA_EXTRA_DEVICE_LINK_FLAGS} -shared -dlink <OBJECTS> -o <TARGET> <LINK_LIBRARIES> -Xcompiler=-Fd<TARGET_COMPILE_PDB>,-FS${__IMPLICT_DLINK_FLAGS}")
+  "<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <FLAGS> ${_CMAKE_CUDA_EXTRA_DEVICE_LINK_FLAGS} -shared -dlink <OBJECTS> -o <TARGET> <LINK_LIBRARIES> -Xcompiler=-Fd<TARGET_COMPILE_PDB>,-FS${__IMPLICT_DLINK_FLAGS}")
 unset(__IMPLICT_DLINK_FLAGS)
 
 string(REPLACE "/D" "-D" _PLATFORM_DEFINES_CUDA "${_PLATFORM_DEFINES}${_PLATFORM_DEFINES_CXX}")