GPU HIP Cmake: Get rid of hipcc, use Clang --cuda-device-only instead

Author: davidrohr

GPU/GPUTracking/Base/cuda/GPUReconstructionCUDA.cu

@@ -28,7 +28,7 @@
 #ifndef __HIPCC__ // CUDA
 #define PER_KERNEL_OBJECT_EXT _fatbin
 #else // HIP
-#define PER_KERNEL_OBJECT_EXT _hip_cxx_o
+#define PER_KERNEL_OBJECT_EXT _hip_o
 #endif
 #define GPUCA_KRNL(x_class, ...) QGET_LD_BINARY_SYMBOLS(GPUCA_M_CAT3(cuda_kernel_module_fatbin_krnl_, GPUCA_M_KRNL_NAME(x_class), PER_KERNEL_OBJECT_EXT))
 #include "GPUReconstructionKernelList.h"

GPU/GPUTracking/Base/hip/CMakeLists.txt

@@ -122,7 +122,7 @@ add_custom_target(${MODULE}_HIP_SRC_CHK ALL DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/
 
 add_custom_command(
     OUTPUT ${GPU_RTC_BIN}.command
-    COMMAND echo -n "${hip_HIPCC_EXECUTABLE} ${GPU_RTC_FLAGS_SEPARATED} ${GPU_RTC_DEFINES} --genco" > ${GPU_RTC_BIN}.command
+    COMMAND echo -n "${CMAKE_HIP_COMPILER} ${GPU_RTC_FLAGS_SEPARATED} ${GPU_RTC_DEFINES} -x hip --cuda-device-only" > ${GPU_RTC_BIN}.command
     COMMAND_EXPAND_LISTS
     VERBATIM
     COMMENT "Preparing HIP RTC command file ${GPU_RTC_BIN}.command"
@@ -159,7 +159,7 @@ if(ALIGPU_BUILD_TYPE STREQUAL "O2")
   install(FILES ${HDRS} DESTINATION include/GPU)
 
 #  o2_add_test(GPUsortHIP NAME test_GPUsortHIP
-#                  SOURCES test/testGPUsortHIP.hip.cxx
+#                  SOURCES test/testGPUsortHIP.hip
 #                  PUBLIC_LINK_LIBRARIES O2::GPUCommon hip::host hip::device hip::hipcub roc::rocthrust
 #                  COMPONENT_NAME GPU
 #                  LABELS gpu)

GPU/GPUTracking/Base/hip/per_kernel/CMakeLists.txt

@@ -9,7 +9,5 @@
 # granted to it by virtue of its status as an Intergovernmental Organization
 # or submit itself to any jurisdiction.
 
-add_library(GPUTrackingHIPKernels OBJECT $<JOIN:$<LIST:TRANSFORM,$<LIST:TRANSFORM,$<LIST:TRANSFORM,$<TARGET_PROPERTY:O2_GPU_KERNELS,O2_GPU_KERNEL_NAMES>,REPLACE,[^A-Za-z0-9]+,_>,PREPEND,${O2_GPU_KERNEL_WRAPPER_FOLDER}/krnl_>,APPEND,.hip.cxx>, >)
-set(CMAKE_CXX_COMPILER ${hip_HIPCC_EXECUTABLE})
-set(CMAKE_CXX_FLAGS "${GPU_RTC_FLAGS} ${GPU_RTC_FLAGS_ARCH} --genco")
-unset(CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE_UPPER})
+add_library(GPUTrackingHIPKernels OBJECT $<JOIN:$<LIST:TRANSFORM,$<LIST:TRANSFORM,$<LIST:TRANSFORM,$<TARGET_PROPERTY:O2_GPU_KERNELS,O2_GPU_KERNEL_NAMES>,REPLACE,[^A-Za-z0-9]+,_>,PREPEND,${O2_GPU_KERNEL_WRAPPER_FOLDER}/krnl_>,APPEND,.hip>, >)
+set(CMAKE_HIP_FLAGS "${CMAKE_HIP_FLAGS} --cuda-device-only")

GPU/GPUTracking/Base/hip/test/testGPUsortHIP.hip.cxx

@@ -9,7 +9,7 @@
 // granted to it by virtue of its status as an Intergovernmental Organization
 // or submit itself to any jurisdiction.
 
-/// \file testGPUsortHIP.hip.cxx
+/// \file testGPUsortHIP.hip
 /// \author Michael Lettrich
 
 #define GPUCA_GPUTYPE_VEGA

GPU/GPUTracking/cmake/kernel_helpers.cmake

@@ -96,7 +96,7 @@ function(o2_gpu_add_kernel kernel_name kernel_files kernel_bounds kernel_type)
   endif()
 
   if(HIP_ENABLED)
-    set(TMP_FILENAMEA "${O2_GPU_KERNEL_WRAPPER_FOLDER}/krnl_${TMP_FILENAME}.hip.cxx")
+    set(TMP_FILENAMEA "${O2_GPU_KERNEL_WRAPPER_FOLDER}/krnl_${TMP_FILENAME}.hip")
     set(O2_GPU_KERNEL_TEMPLATE_REPLACE "${TMP_KERNEL}")
     configure_file(${O2_GPU_BASE_DIR}/Base/hip/GPUReconstructionHIPkernel.template.hip ${TMP_FILENAMEA})
   endif()