AMD's ROCm stack

You will find examples how this toolchain is used on particular machines on the page Reference Configurations for some machines.

For the AMD toolchain we need to load either ROCm or AOMP. Both modules should have AMD's version of Clang. With the AMD toolchain we use AMD's modified Clang. We again need to point CXX and CC to the AMDClang compiler.

OpenMP and OpenMP offloading

For the configuration with OpenMP GPU offloading, we again specify --with-gpu=omp to make Peano GPU aware. Furthermore, we need to add AMD specific offloading instructions:

CC=amdclang CXX=amdclang++ ./configure --with-multithreading=omp --with-gpu=omp CFLAGS="-O3 -W -Wall -Wno-attributes -fopenmp --offload-arch=gfxXXX -D__AMDGPU__" CXXFLAGS="-std=c++17 -O3 -W -Wall -Wno-attributes -fopenmp -lstdc++fs --offload-arch=gfxXXX -D__AMDGPU__" LDFLAGS="-march=native -mtune=native -lstdc++fs -fopenmp --offload-arch=gfxXXX"

where XXX has to be replaced by the actual compute capability of the device.

Note: We define the preprocessor flag AMDGPU to allow Peano for compiling patches that are needed only for the AMD toolchain.