cmake_minimum_required(VERSION 3.20)

list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/Modules")

project(nbody LANGUAGES C CXX CUDA)

find_package(CUDAToolkit REQUIRED)

set(CMAKE_POSITION_INDEPENDENT_CODE ON)

set(CMAKE_CUDA_ARCHITECTURES 50 52 60 61 70 75 80 86 89 90)
if(CMAKE_BUILD_TYPE STREQUAL "Debug")
    # set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} -G")  # enable cuda-gdb (expensive)
endif()

# Include directories and libraries
include_directories(../../../Common)

find_package(OpenGL)
find_package(GLUT)

# Source file
if(${OpenGL_FOUND})
    if (${GLUT_FOUND})
        # Add target for nbody
        add_executable(nbody bodysystemcuda.cu render_particles.cpp nbody.cpp)

target_compile_options(nbody PRIVATE $<$<COMPILE_LANGUAGE:CUDA>:--extended-lambda>)

target_compile_features(nbody PRIVATE cxx_std_17 cuda_std_17)

        set_target_properties(nbody PROPERTIES CUDA_SEPARABLE_COMPILATION ON)

        target_include_directories(nbody PUBLIC
            ${OPENGL_INCLUDE_DIR}
            ${CUDAToolkit_INCLUDE_DIRS}
            ${GLUT_INCLUDE_DIRS}
        )

        target_link_libraries(nbody
            ${OPENGL_LIBRARIES}
            ${GLUT_LIBRARIES}
        )

    else()
        message(STATUS "GLUT not found - will not build sample 'nbody'")
    endif()
else()
    message(STATUS "OpenGL not found - will not build sample 'nbody'")
endif()