Begin new omp target update PR to replace hpc4cmb#603

etc/pyomptarget/Makefile

@@ -1,27 +1,40 @@
 
 # GCC 12.1.0 with offload support
-CXX := g++-12
-CXXFLAGS := -O0 -g -fPIC -pthread -std=c++11 -fcf-protection=none -fno-stack-protector
-CXX_OMP_FLAGS := -fopenmp -foffload=nvptx-none='-Wa,-m,sm_80 -misa=sm_80 -fPIC -lm -latomic'
+#CXX := g++-12
+#CXXFLAGS := -O0 -g -fPIC -pthread -std=c++11 -fcf-protection=none -fno-stack-protector
+#CXX_OMP_FLAGS := -fopenmp -foffload=nvptx-none='-Wa,-m,sm_80 -misa=sm_80 -fPIC -lm -latomic'
 
 # NVHPC
 # CXX = nvc++
 # CXXFLAGS = -O0 -g -fPIC -pthread -std=c++11
 # CXX_OMP_FLAGS = -mp=gpu -Minfo=mp -gpu=cc86
 
+# AMD LLVM
+CXX := amdclang++
+CXXFLAGS := -O3 -g -fPIC -std=c++11
+CXX_OMP_FLAGS := -fPIC -fopenmp -fopenmp-target-debug=3 -fopenmp-targets=amdgcn-amd-amdhsa -Xopenmp-target=amdgcn-amd-amdhsa -march=gfx1030
+CXX_LD_FLAGS := -lomp -lomptarget -lomptarget.rtl.amdgpu
 
 pybind := ../../src/toast/pybind11
 modext := $(shell python3-config --extension-suffix)
 pyincl := $(shell python3-config --includes)
 
 
+all : device_info test pyomptarget$(modext)
+
+
 pyomptarget$(modext) : module.o
-	$(CXX) -shared -o pyomptarget$(modext) module.o $(CXX_OMP_FLAGS)
+	$(CXX) -shared $(CXX_OMP_FLAGS) -o pyomptarget$(modext) module.o $(CXX_LD_FLAGS)
 
 module.o : module.cpp
 	$(CXX) $(CXXFLAGS) $(CXX_OMP_FLAGS) -I. -I$(pybind)/include $(pyincl) -c -o module.o module.cpp
 
+device_info : device_info.cpp
+	$(CXX) $(CXXFLAGS) $(CXX_OMP_FLAGS) -o device_info device_info.cpp $(CXX_LD_FLAGS)
+
+test : test.cpp
+	$(CXX) $(CXXFLAGS) $(CXX_OMP_FLAGS) -o test test.cpp $(CXX_LD_FLAGS)
 
 clean :
-	rm -f *.so *.o
+	rm -f *.so *.o device_info test
 

etc/pyomptarget/device_info.cpp

@@ -0,0 +1,17 @@
+
+#include <omp.h>
+//#include "omptarget.h"
+#include <iostream>
+
+int main(int argc, char **argv) {
+  int ndev = omp_get_num_devices();
+  std::cout << "OMP found " << ndev << " available target offload devices" << std::endl;
+  int target = ndev - 1;
+  int host = omp_get_initial_device();
+  int defdev = omp_get_default_device();
+  std::cout << "OMP initial host device = " << host << std::endl;
+  std::cout << "OMP target device = " << target << std::endl;
+  std::cout << "OMP default device = " << defdev << std::endl;
+  return 0;
+}
+