GPU CMake: Use CUDA/HIP compilers to preprocess CUDA/HIP RTC files

Author: davidrohr

GPU/GPUTracking/Base/cuda/CMakeLists.txt

@@ -68,7 +68,7 @@ set(GPU_RTC_BIN ${CMAKE_CURRENT_BINARY_DIR}/GPUReconstructionCUDArtc)
 add_custom_command(
     OUTPUT ${GPU_RTC_BIN}.src
     COMMAND cp ${GPUDIR}/Base/cuda/GPUReconstructionCUDAIncludesSystem.h ${GPU_RTC_BIN}.src
-    COMMAND ${CMAKE_CXX_COMPILER} ${GPU_RTC_DEFINES} ${GPU_RTC_INCLUDES} -std=c++${CMAKE_CUDA_STANDARD} -D__CUDA_ARCH__=${RTC_CUDA_ARCH} -D__CUDACC__ -x c++ -nostdinc -E -P ${GPU_RTC_SRC} >> ${GPU_RTC_BIN}.src
+    COMMAND ${CMAKE_CUDA_COMPILER} ${GPU_RTC_DEFINES} ${GPU_RTC_INCLUDES} -std=c++${CMAKE_CUDA_STANDARD} -D__CUDA_ARCH__=${RTC_CUDA_ARCH} -D__CUDACC__ -x c++ -E -Xcompiler "-nostdinc -P" ${GPU_RTC_SRC} >> ${GPU_RTC_BIN}.src
     MAIN_DEPENDENCY ${GPU_RTC_SRC}
     IMPLICIT_DEPENDS CXX ${GPU_RTC_SRC}
     COMMAND_EXPAND_LISTS

GPU/GPUTracking/Base/hip/CMakeLists.txt

@@ -115,7 +115,7 @@ set(GPU_RTC_BIN ${CMAKE_CURRENT_BINARY_DIR}/GPUReconstructionHIPrtc)
 add_custom_command(
     OUTPUT ${GPU_RTC_BIN}.src
     COMMAND cp ${GPUDIR}/Base/hip/GPUReconstructionHIPIncludesSystem.h ${GPU_RTC_BIN}.src
-    COMMAND ${CMAKE_CXX_COMPILER} ${GPU_RTC_DEFINES} ${GPU_RTC_INCLUDES} -std=c++${CMAKE_HIP_STANDARD} -D__HIPCC__ -D__HIP_DEVICE_COMPILE__ -x c++ -nostdinc -E -P ${GPU_RTC_SRC} >> ${GPU_RTC_BIN}.src
+    COMMAND ${CMAKE_HIP_COMPILER} ${GPU_RTC_DEFINES} ${GPU_RTC_INCLUDES} -std=c++${CMAKE_HIP_STANDARD} -D__HIPCC__ -D__HIP_DEVICE_COMPILE__ -x c++ -nostdinc -E -P ${GPU_RTC_SRC} >> ${GPU_RTC_BIN}.src
     MAIN_DEPENDENCY ${GPU_RTC_SRC}
     IMPLICIT_DEPENDS CXX ${GPU_RTC_SRC}
     DEPENDS ${MODULE}_HIPIFIED