How to use externally installed RAJA suite in CMake?

[pranav-sivaraman]

I am struggling to find any examples or documentation on how to use the RAJA suite if its externally installed. All the examples I find either use BLT or build RAJA while building the application.

Here is a simple CMake file.

cmake_minimum_required(VERSION 3.21)

project(saxpy VERSION 1.0 LANGUAGES CXX CUDA)

set(CMAKE_CXX_STANDARD 17)

find_package(RAJA REQUIRED)
find_package(Chai REQUIRED)
find_package(Umpire REQUIRED)

set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} -std=c++17 -forward-unknown-to-host-compiler -arch=sm_70 -extended-lambda -restrict -keep ${CUDA_EXTRA_FLAGS}")

add_executable(saxpy saxpy.cpp)
target_link_libraries(saxpy RAJA chai umpire)

set_source_files_properties(saxpy.cpp PROPERTIES
                                  	LANGUAGE CUDA)

set_target_properties(saxpy PROPERTIES
                        	CUDA_SEPERABLE_COMPILATION ON
                        	CUDA_STANDARD 17
                        	CUDA_STANDARD_REQUIRED ON)

However, I am getting the following error
/usr/bin/ld: cannot find -lcuda_runtime

These are the package specs I installed with Spack on Summit with CUDA 11.7

camp@2022.10.1 ~openmp +cuda cuda_arch=70
raja@2022.10.4 ~openmp +cuda cuda_arch=70
umpire@2022.10.0 ~openmp +cuda cuda_arch=70
chai@2022.03.0 ~openmp +raja +cuda cuda_arch=70

Would greatly appreciate if I could get some help in the form of a minimal example CMake file for the CUDA/HIP backends.

[pranav-sivaraman]

Closing. Upon investigating the issue seems to be related to CHAI not RAJA or Umpire.

I am going to assume this is fixed for newer versions of CHAI, but if you are on older versions the following issue seems to fix the -lcuda_runtime issue.

get_target_property(chai_interface_libs chai INTERFACE_LINK_LIBRARIES)
list(REMOVE_ITEM chai_interface_libs cuda_runtime)
set_target_properties(chai PROPERTIES INTERFACE_LINK_LIBRARIES ${chai_interface_libs})